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In this article , we explored why Serengeti’s photochromic lenses don’t activate fully behind a windshield. While that might sound like a flaw on paper, it actually highlights a common problem most people never realize: Many sunglasses are too dark for driving. Let’s break it down. The VLT Problem: Glass on Glass Sunglasses are rated by Visible Light Transmission (VLT)—that’s the percentage of light that passes through the lens. The lower the number, the darker the lens. Typical category 3 sunglasses (which is most of what’s sold) have a VLT of 10–15%. That’s great when you're in direct sun, hiking, fishing, or on the beach—but once you step behind a car windshield, things change fast. Why? Because windshields already block light, often reducing it by 30–35% before it even reaches your eyes. Combine that with your sunglasses, and you’re now down to just 10% or less of visible light reaching your eyes. That’s darker than most people realize—and in many conditions, it’s too dark for comfort or even safety. This is what a typical car looks like with tinted windows in the back, with only a slight tint in the front. (This is why I don't wear sunglasses in the back seat normally - it's too dark.) That slight tint is deceiving, though. Even clear lenses like regular eyeglasses or untinted windows block around 9% of light. Standard car windows in the US and Canada are usually tinted to 30%, which you generally wouldn't notice but it's apparent when you compare like this: What does this mean for total light coming in, together with sunglasses? If there were 100 units of light coming from the sun, only 70 are getting to the sunglasses once the window does its part. If the sunglasses are a 15% VLT, which is standard for dark sunglasses, they will block 85% of the 70 units coming through, so only 10.5 units are making it to your eyes. 10.5% vs 15% when standing outside the car. That is, of course, 30% darker. That’s a pretty big difference when it comes to contrast, clarity, and comfort, especially in shaded or overcast conditions. It makes the category 3 lenses closer to a category 4 lens. When sunglasses are too dark while driving, it can affect: Depth perception Contrast sensitivity Reaction time Visibility in shaded or variable light conditions On overcast days, shaded roads, tunnels, or when driving at dusk, overly dark lenses can quickly become a liability. Serengeti Lenses: A Smarter Match for Driving Here’s where Serengeti lenses become uniquely valuable. Serengeti lenses combine photochromic, Spectral Control (contrast enhancement), and polarization (optional) in one package. But as we covered in this article , their photochromic activation is significantly reduced behind a windshield. Instead of seeing that as a negative, it makes perfect sense for driving. Because their lenses don’t darken fully behind glass, Serengeti’s driving lenses typically hover around 20% VLT under most conditions in a car. That’s noticeably brighter than standard sunglasses, but often just right behind a windshield. Get 30% off at Serengeti with code SUNSCIENCE30 Other brands also have great lenses with higher VLT, but I wanted to highlight Serengeti because they really thrive here. Some others worth looking at are Oakley Prizm Ruby , Maui Jim Blue Hawaii in MauiPure material, Maui Jim HT , and Dita Lancier Land . Most people never think about the VLT of their sunglasses or the tint of their car windows. But once you combine both, you’re often getting double-dimmed—and that has real consequences on how well you can see. Let Me Show You Let's start with a mixed day, sometimes sunny when the clouds part, sometimes darker. Without sunglasses, you can see, but you will be squinting heavily. For much of the US, EU, and Canada, this is what you will see most on a typical highway drive. Now let's put on a brown lens with a 20% VLT. The colors are vivid, bright, and very easy on the eyes. Remember, the windshield is helping out with a 70% VLT as well, so it feels very comfortable, not too dark. Now, if you have a brown lens with a 10% VLT, it will be too dark. Clearer colors and more contrast and definition than with nothing, but not enough light to give proper information about the road and the distance. Now let's see a very bright, clear day. It is not just a matter of squinting here, it is nearly impossible to open your eyes. It is hazardous. And that's with the slight tint of the windshield. Here, I used a 15% VLT on a grey lens like Randolph American Gray . The view is now comfortable and safe, you can easily make out all details, and the colors are nice and not washed out. If in this situation you wanted to wear a 10% VLT lens like Costa 580 Grey , it would be even more comfortable, but not remarkably so. I would probably use a lens like this in this case, but the point is that you don't have to. The tinted window allows relatively lighter lenses (but still dark ones) to be comfortably worn in bright conditions. Should You Still Use Darker Lenses for Driving? It depends. On very bright days or if your car has untinted front windows, a darker lens might still work fine. But for many people, especially those who find their sunglasses too dark for early morning, late afternoon, or cloudy days, switching to a higher-VLT lens can be a game-changer. If you are light sensitive, you may want a darker tint as well. But not as many people are as light sensitive as they think; they are just wearing poor shades. Conclusion - Your Driving Sunglasses Might Be Too Dark When it comes to driving, it’s easy to assume that darker is better—but that’s not always the case. Once you factor in the light filtering from your windshield and front windows, many standard sunglasses end up being too  dark for optimal vision on the road. That can impact your ability to see clearly, react quickly, and stay comfortable, especially in everyday driving conditions that aren’t full, blinding sun. That’s why lenses like Serengeti’s, which maintain a moderate VLT behind glass, are so well suited for driving. They give you enough protection from bright light, but still allow plenty of visibility, contrast, and clarity when the sun ducks behind the clouds or you head into a tunnel. Ultimately, it’s not just about how dark your sunglasses are—it’s about how they work with your environment . And once you start thinking about VLT in that context, you’ll understand why so many people unknowingly drive with lenses that are too dark for their needs.

When the Fall comes, a lot of what we see changes, and how we use lenses to get the best out of it might change as well. In This Article Sunny or Cloudy Green Lenses Brown Lenses Rose Lenses Conclusion - Best Sunglass Lenses for the Fall After summer ends, and the bright greens and clear skies with it, the trees change colors to red and yellow and the clouds become thicker and more prevalent. Many people feel the Fall is the most colorful and beautiful time of the year. What is the best way to use sunglass lenses to enhance the view? Sunny or Cloudy First off, it depends on whether the skies are clear or not. Brilliant blue skies are less common in the Fall than in the Summer, but when that happens it doesn't particularly matter which lens is worn. Even a plain grey lens will suffice, as long as it removes glare and allows the brilliance of the changing colors to shine. The only lens I would recommend against wearing is a blue-tinted lens (not blue-mirrored). This lens will tamp down on the reds and yellows and dull the view. Some lenses will be more brilliant than others, however. The way it works for the Fall is this: Any lens that you enjoy when it is overcast will be even better in full sun. Green and Grey lenses will only be good in full sun. Let's take a look at each lens color. Green Lenses Though many trees do change colors, many do not, most notably evergreen trees. Using green lenses will boost the greens while keeping the reds and yellows bright enough to be pleasant. Green lenses have the interesting feature that they can block a lot of light but still have a relatively bright effect compared to grey lenses because our eyes are most sensitive to green. This makes them well-suited to bright days when we would want the colors to be stable, as the warmth of the reds and yellows are already enough to add plenty of color to the view. Green lenses are excellent for the summer and they remain pleasant and comfortable on sunny Fall days, especially if you find the colors overwhelming and a brown or rose would be too much. They perform poorly in overcast conditions, however. Once the overall light level is decreased and the clouds cause a diffused effect which lowers contrast, green lenses will be too dull and dark. Here is green in sunny conditions. I modeled it with the Serengeti 555nm lens ( 30% off with code SUNSCIENCE30 ). No Lens Green Lens Here is how it looks with overcast conditions. Not ideal. No Lens Green Lens Brown Lenses Brown lenses are arguably the best lenses in the Fall. This is because they boost reds and yellows while keeping greens bright . Only the blues of the sky are somewhat negatively impacted, though the number of bright sky days is limited in the Fall anyway. The bright colors brown lenses produce are spectacular. They work well in full sun and are wonderful in overcast conditions where they add color and contrast and even make it feel brighter. Here is how they look in full sun. This is modeled on the Maui Jim HCL Bronze lens ( Buy Here ) . The Serengeti Drivers ( Buy Here ) lens is also amazing for these conditions. A great budget option is Island Optics brown lens or green mirror lens. No Lens Brown Lens Here is how it looks with overcast conditions. Brighter, more colorful, and more contrast. No Lens Brown Lens You cannot go wrong with brown lenses for the Fall. Rose Lenses With rose lenses , we get an interesting mix of the effects of brown and green lenses. This is because rose lenses boost reds and blues, while greens are relatively subdued. That means the reds of the trees will be as red as they can be, but the sky will be a brilliant blue as well, once your eyes adjust . Greens will be fine, but not bright. It will feel like a grey lens with colors boosted to some degree. Here is how they look in full sun. This is modeled on the Revo Drive lens, but the Serengeti Sedona ( Buy Here ), Dita Lancier Land ( Buy Here ), or Maui Jim Rose ( Buy Here ) lenses will be great as well. No Lens Rose Lens In overcast conditions, it depends. If it's hazy or relatively bright overcast, rose lenses work very well, like in the Oakley Prizm pictures here. In darker overcast skies category 3 rose lenses may feel too dark. No Lens Rose Lens Conclusion - Best Sunglass Lenses for the Fall In conclusion, as Fall arrives and the landscape transforms into a vibrant mix of reds, yellows, and muted greens, choosing the right lenses can significantly enhance your visual experience. Whether you're dealing with sunny or overcast conditions, there's a lens that can bring out the best in the season's colors. Green lenses excel on bright, sunny days, keeping the greens vivid while allowing the reds and yellows to shine. Brown lenses, the most versatile for Fall, amplify the warmth of reds and yellows and offer excellent contrast, even in overcast weather. Rose lenses provide a unique mix, enhancing reds and blues, making them ideal for both bright and mildly overcast skies. With the right pair of lenses, you can fully enjoy Fall’s spectacular display, no matter the weather. For what it's worth, I wear the Serengeti Drivers the most in the Fall. The combination of brown and rose blows me away every time.

There is a lot of confusion and conflicting information regarding Serengeti's famous photochromic lenses and whether or not they darken behind a windshield. Check out Serengeti on Serengeti's Website (use code SUNSCIENCE30 for 30% off!) Serengeti lenses are right at home on the road, which they were designed for. Their flagship lens is even called the Drivers lens. Their marketing is heavily geared toward driving and similar conditions. From my own experience and the experiences of all the happy customers Serengeti has sold lenses to since 1985, the product really does live up to the marketing. You would think then, that the photochromic lenses would darken and brighten based on the conditions while behind a windshield. But it isn't so simple. Despite having some patents that imply the photosensitivity of the lenses may not only rely on UV light exposure to work, Serengeti has confirmed that their lenses do work with UV rays alone: "As the pioneer of Photochromic technology, Serengeti® leads the industry in creating lenses that adapt to any light condition in any setting. Serengeti® Photochromic lenses are activated by the amount of UV radiation in the atmosphere and engineered to transition from light to dark, gradually. In bright conditions, UV radiation is more intense. The lens molecules expand in size, darkening the lenses. Less light can then pass through. In darker conditions, UV radiation is less intense. The molecules shrink and separate, lightening the lenses. More light can pass through. Your eyes are always protected and receive the optimal amount of light needed at any times and in all weather conditions. You are able to discern shapes and colors more quickly while eliminating eyestrain." Modern cars have had windshields that are 100% UV protective for several decades. The development of UV-protective glass for windshields began in earnest in the 1980s and 1990s as awareness of the harmful effects of UV radiation grew. By the early 2000s, most new cars were equipped with windshields that provided nearly 100% protection against UVB rays and a significant amount of UVA rays. Today, it is standard for windshields in almost all vehicles to offer complete UV protection. This is achieved through the use of laminated glass that has a plastic layer (usually polyvinyl butyral, or PVB) sandwiched between two layers of glass, which effectively blocks UV radiation. Keep in mind that the Drivers lenses were introduced in the 80s. (It's interesting to note that Transitions Drivewear does darken behind a windshield and does not rely on UV rays to do so). So do Serengeti lenses change behind a car windshield or not? SportRX has put out several videos over the years that explicitly say that Serengeti lenses do darken in cars. In this video at the 5:55 mark, Rob says exactly that. Now I know that Rob Tavakoli knows a lot more about sunglasses than I do, but I needed more confirmation. I reached out to Serengeti and this is what they sent me: "Indeed, the lens reacts to the amount of UV radiation in the atmosphere, engineering to transition from light to dark gradually. Depending on how much light is being transmitted through your windshield you will notice a gradual change." I pushed them to be specific: "Can you please clarify? If the windshield is 100% UV protective will the lens not adjust at all or will it still adjust based on some other factors like visible light exposure?" And this is what they replied: I also found an old SportRX chat I had in which I asked the same question: So there is a bit of confusion regarding what happens to the lenses. In my experience of wearing all of Serengeti's lenses for years, in all conditions and seasons, I am sure they get darker in a car, but only partially. Firstly, it is important to note that Serengeti lenses are only moderately photochromic. Even in the darkest room, they are still dark category 2 lenses with a full tint. In full sun, they do darken, but it is hard to notice the difference visually. It is noticeable how the slightly darker tint is more comfortable to look through in full sun, but the change is not easily apparent to the eye. Secondly, though windshields nowadays block nearly 100% UV light, passenger windows do not (which is also important to know for skin protection if the sun is shining from the side on a long drive). I think the UV light that comes in through the side and rear windows changes the tint somewhat and that could be why there is some conflicting information. That is also why regular transition lenses that change from fully clear to fully dark will still get somewhat of a tint when in a car, but not a full tint. For Serengeti, that slight change is enough to add comfort to the tint in full sun. This is what I've concluded driving in overcast conditions and full sun. I am convinced the lenses get slightly darker when it's sunny outside. Another factor that should be considered is the necessity of having a very dark tint when under a shaded roof. Since, for most of the day, the roof of the car shields the driver from direct sunlight even more than a hat does, there is less need for a very dark tint. For most people, a 15-18% VLT is probably the sweet spot while driving. Since Serengeti Drivers are a 23% to 9% VLT, even having a slight darkening effect in full sun gets the lenses right where they need to be. When the driver leaves the car and the protection of the roof, the lenses can then adjust to add even more protection and comfort. In conclusion, while Serengeti’s photochromic lenses might not fully darken behind a modern UV-protective windshield, they still offer exceptional comfort and clarity. The slight darkening that does occur, combined with their overall quality, makes them an excellent choice for driving and other activities. I highly recommend Serengeti lenses for anyone seeking reliable and comfortable eyewear on the road.

Though not an exact science, it is useful to keep a scoring system in order to better understand which sunglass lenses transcend others. This is my ranking tier system. For a list of sunglass lenses organized by tier, click here . Tier 1: Elite The best of the best. These lenses offer exceptional quality and performance, making them worth actively seeking out. They provide unparalleled clarity, color enhancement, and contrast, making them ideal for anyone who wants the very best viewing experience. They may not be the best in every situation, but the experience they provide in environments they thrive in is unmatched. It may be worth sacrificing the style or construction of the frame in order to acquire these lenses.   Tier 2: Exceptional Amazing lenses that excel in specific conditions or slightly lag the tech of tier 1. While they may not be perfect, they will still be a pleasure to wear, and their quality is worth considering a purchase. They may perform even better than Tier 1 in particular situations, such as extreme bright sunlight, low light, or atypical environments. If you need lenses for a specific activity or condition, or you love the frame they come with, these are a superb choice.   Tier 3: Excellent Great lenses that offer a consistently good experience. While they may not be the absolute best, they provide excellent protection, clarity, and comfort. If you want a reliable and high-quality lens, these are a great option. These can also thrive in very specific circumstances. Glass lenses with no significant added tech, most high-quality nylon or polycarbonate lenses. Consider purchasing if the frame choice is important.   Tier 4: Standard Fine lenses that meet basic expectations. They provide adequate protection and clarity but lack the exceptional quality and features of higher-tier lenses. If you're looking for a no-frills option, these lenses will suffice. Glass lenses that are unremarkable or not particularly useful, and non-glass but with some tech and all basic coatings included. Worth buying at low prices or keeping as beater pairs.   Tier 5: Basic Essentially the minimum quality you can expect. These lenses provide basic protection but lack the clarity, comfort, and features of higher-tier lenses. While they can be cheap (though often that is not the case), they're disappointing overall and not recommended for anyone who wants a good sunglass experience. Will often not have even basic coatings included. Not worth buying.

Due to some confusion around how Maui Jim customization works, let's explain exactly how it works. Firstly, customization here means you can choose any lens color for any frame. This is for non-prescription only. You can only do this on the Maui Jim website . Third-party websites or Amazon won't have this option. A dealer can also do this for you, but it's through the same mechanism. Right under the lens and frame information near the price, there is a button that says "Customize with MyMaui". It is nice that this option is available at no added cost. I wish other brands did this standard too. Even though you can get any color, it gets complicated when it comes to what lens material you will get, and it can make a big difference with some lenses, especially the Blue Hawaii . All Maui Jim frames come with a selection of stock lens choices, either Superthin Glass, MauiBrilliant, MauiPure, Ultra (which is new), or polycarbonate. These are the ones you will see on any listing before you choose customization. The difference between them is beyond the scope of this post; that's for another time. All Maui Jim custom lenses are MauiBrilliant. So, if you see the stock lenses are Glass or MauiPure, if you choose a color that is not one of the stock choices, then the material will change to MauiBrilliant. However, if you merely switch frame colors but use a lens that is a stock choice, you will still get the stock lens material. Customization Menu For example, if you are looking at the Kanaio Coast , it has Neutral Grey, Blue Hawaii, MAUIGreen, and HCL Bronze as stock lenses that are all glass. If you wanted to switch the matte black frame with the matte tortoise one, but keep the Neutral Grey lenses, you would get the Glass lenses. But if you wanted the MauiSunrise lens, you would get that in MauiBrilliant. I personally got the Aeko, which comes with MauiPure lenses, with the HT lens, which then came in MauiBrilliant. My custom order There is an exception to this that makes it a bit complicated. If Maui Jim once had the model with a different lens color in Glass or MauiPure but no longer sells that, they will use it when someone customizes the lens in that color. In my case, the Maui Jim Castles used to come with MauiRose lenses, but no longer does. I customized the frame with the MauiRose lenses, and it came in glass, not MauiBrilliant, because they still had those lenses in supply. How would you know that in advance? You would have to ask Maui Jim, there is no other way to know. I do not even know if they still have the MauiRose available in Glass for the Castles. I had to ask. And there's more to this as well. If a lens comes standard with gradient lenses but you customize it, it will come in full tint with bi-gradient lenses in MauiBrilliant. So if you get the Mavericks , whose non-mirrored options are all gradient, with MauiRose lenses, they will come in full tint and switch from MauiPure to MauiBrilliant. If you aren't sure which lens you are interested in, I review all Maui Jim lenses here .

Maui Jim is known for making amazing lenses that are right at home in full sun, managing glare easily while boosting colors and contrast as well as any sunglass lenses you can buy. This is what Category 3 lenses (8-20% VLT) are geared towards. They also make an excellent lower-light lens called the HT (High Transmission) Lens, a light green polarized lens that is excellent in bright mornings or on bright, overcast days. What they don’t tell you anywhere on their website or marketing is that many, but not all, of their single gradient lenses are category 2, with a VLT (Visible Light Transmission) of 18-45%. This makes them considerably lighter than the full tint or bi-gradient tints that are in the 9-15% VLT range, and not well suited to full bright sun conditions. Maui Jim confirmed this information to me, and they do communicate it - on the box. On the label it will say either 3P, meaning category 3 polarized, or 2P, category 2 polarized. But they do not mention this at all on their website. The website would lead you to believe that when you are buying a lens of any particular color it will be the same the standard tint, but that isn’t the case. It is a little bewildering that you would only find out this information once the product has arrived in your hands. Maui Jim has confirmed to me that the following lenses are Category 2: Polycarbonate - MauiHT MauiEvolution - MauiHT MauiPure - MauiHT MauiBrilliant - MauiHT Super Thin Glass - Neutral Grey, HCL Bronze, MauiHT, and MauiRose all in a single gradient (mirrored on top of the lens only) This means all Maui Jim gradient lenses in the prized SuperThin Glass are category 2. That being said, my wife has the SuperThin glass in gradient for the Neutral Grey, HCL Bronze, and MauiRose lenses and they are not all standard category 2 lenses. The Bronze lens feels like a category 3 lens, and the Rose isn’t that far behind. The Grey, however, is a surprisingly light tint and she won’t wear it when it’s even moderately bright outside. The good news is that most of the MauiBrilliant gradient lenses are Category 3 lenses. This is important because that is the material all Maui Jim prescription lenses are made in. It is disappointing that Maui Jim, who is usually very good at communication and customer service, is not clear about this. Many people buy Maui Jim’s thinking they will be perfect for bright, full sun conditions, but clearly, some of these lenses are not. This is especially important to note for many of their styles for women which often feature gradient lenses. Many of their new higher fashion styles are also gradient. This may be surprisingly good news for people who want lighter lenses for overcast days or ease of use indoors. Regardless, though some of these lenses may be brighter than is advertised, they are still extremely well made and the optics and color enhancement are fantastic. This post is meant to inform readers and consumers, not to disparage Maui Jim or discourage you from buying their sunglasses. To the contrary, read our reviews on Maui Jim lenses and see why they are most likely right for you. The Maui Jim reviews on Sunglass Science are of the standard versions, not the gradients, though they may be mentioned as well.

Lens scratching is the most common issue for sunglasses and one of the hardest to avoid. It makes the view less clear, it ruins the coatings, and replacements can be costly. So let's understand the science behind why lenses scratch, scratch resistance, and how to avoid this from happening to your shades. In This Article What Causes Lens Scratches? What The Real Enemy Is Anti-Scratch Coatings Explained Mirror Coatings and Encapsulated Mirrors Myths About Fixing Scratched Lenses Proper Cleaning Methods Storage & Handling What To Do If Your Lenses Get Scratched Final Tips Conclusion - The Complete Guide to Sunglass Lens Scratching and How to Avoid It What Causes Lens Scratches? The first thing to know about lens scratching, or any scratching, is the Mohs scale. Mark Rober explains it in this short video: The Mohs scale is a way of ranking minerals by how hard they are, based on their ability to scratch one another. It was developed in 1812 by Friedrich Mohs, a German geologist. Here’s how it works: The scale runs from 1 to 10, with 1 being the softest (easily scratched) and 10 being the hardest (scratches all others). Each step on the scale is defined by a specific reference mineral, from talc, which is very soft and you can scratch it with your fingernail, to diamond, the hardest natural substance that scratches everything else. The scale is ordinal, not linear. That means the jump in hardness between some numbers is much bigger than others. For example, diamond (10) is about four times harder than corundum (9), not just a little harder. It’s a relative test, not an absolute measurement. It’s useful in the field or lab for quick comparisons, but modern science also uses precise hardness tests (like Vickers or Knoop) that measure resistance to indentation in units. However, for practical purposes in learning how to prevent scratches, the Mohs scale will be much more beneficial. So to understand why lenses scratch, it's helpful to know the Mohs number of the lens material, the lens coatings, and the object that scratches the lens. It is not easy to find Mohs figures for each lens material, because the Mohs scale is for minerals, not plastics, so it doesn't translate well. But we can generalize for our purposes of understanding what would cause scratching. Mineral glass has a Mohs hardness of 5-6. All other uncoated lens materials are somewhere between 1-3. I am lumping together all non-glass lenses for this, because even though they vary in terms of scratch resistance, the difference is small compared to what glass has. That Glasses Guy on YouTube shows that: Keep in mind, we are not talking here about impact resistance, weight, or clarity. Just scratch resistance. As mentioned, the Mohs scale is ordinal, not linear. A material at 6 will scratch one at 2 every time, but the step sizes aren’t even. The jump from 5→6 isn’t the same as 2→3 or 9→10. If you want a real multiplier, you have to use an absolute hardness test (Knoop, Vickers, Rockwell) for the specific materials and then compare those numbers. On those scales, a typical Mohs-6 material is many times harder than a Mohs-2 material (often an order of magnitude or more), but the exact ratio depends on the materials and the test method. So glass vs polycarbonate scratch resistance is probably many times more. What The Real Enemy Is Check out this video Otis made touting their glass lenses' scratch resistance vs plastic: Most house keys are made of brass (Mohs 3) or Aluminum (2.75). So, it's easy to see why plastic suffers here, but glass does so well. Don't think this is true of all metals, though; some steel products can be as hard as a 6.5 Mohs. But metal is not our main concern. The real enemy is sand, specifically quartz. Quartz has a Mohs of 7, and is everywhere. In sand, dust, clothing fibers, etc. This video that Otis did at the beach gives me goosebumps. I don't know what kind of rock that was, but DO NOT TRY THIS AT HOME, no matter what material your glasses are. For glass lenses, quartz is enemy number 1, always. Keep your lenses away from rubbing against any kind of sand, dirt, or surface that has hard minerals like granite counters in a kitchen or mantle. You can take them to the beach, but keep them off the sand. We will get to cleaning lenses soon, but do not wipe your lenses if there can be any sand on them with any type of cloth until they are washed first. Otherwise, you will drag sand across the surface of the lens. With non-glass lenses, it is much worse. The same guidance about sand and hard minerals applies to an even greater degree, but now many more environmental and habitual risks come into play. Want to wipe your lenses with your shirt or a tissue? With glass lenses, it's not recommended, but it probably won't be the end of the world. With non-glass, especially uncoated, doing that will destroy your lenses in short order. Salt has a Mohs hardness of about 2-2.5. So, dealing with salt water on glass lenses is not a problem unless there are clumps that can have some sand mixed in. But non-glass lenses will struggle with saltwater. "Dirt" is a mix of things, so its hardness depends on what minerals it’s made of. Clay and salt have a Mohs of 2-4, bad for plastics but not glass. But any quartz in there makes it much worse. Concrete contains quartz and other hard silicates. Ceramic and porcelain, like bathroom tiles, kitchen counters, and mugs, often have a Mohs 6–7. Jewelry like diamonds (10), sapphires/rubies (9), emeralds (7.5–8) are all much harder than glass. For non-glass lenses, everyday items become more of a problem. Fingernails are about 2.2-2.5 Mohs. Paper towels are 2-2.5 (but the real issue with those are contamination with dust and dirt they pick up). Most fabrics (shirts, microfiber cloths if clean) made of cotton, polyester, nylon fibers are roughly 2–3 Mohs. Here's a chart: Material / Item Mohs Hardness Risk to Plastic Lenses Risk to Glass Lenses Notes Fingernail 2–2.5 ✅ Safe ✅ Safe Won’t scratch either. Microfiber cloth (clean) ~2 ✅ Safe ✅ Safe Safest option — traps particles. Shirt / cotton / soft fabric 2–3 ⚠️ Low (if clean) ✅ Safe Safe if clean, but dangerous if dusty. Paper towel / tissue 2–2.5 (cellulose) ⚠️ Moderate (with pressure) ✅ Safe (if clean) Main risk: picks up dust/silica. Wood 2–2.5 ⚠️ Moderate ✅ Safe Dust in wood surface can scratch. Plastic objects (pens, etc.) 2–3 ⚠️ Moderate ✅ Safe Same hardness as lenses, may leave marks but not deep scratches. Dirt / soil Mixed (2–7) ❌ High ❌ High Contains silica/quartz (Mohs 7). Sand (quartz) 6–7 ❌ Severe ❌ Severe Biggest everyday risk — scratches both instantly. Metals (coins, keys, etc.) 3–6 (varies) ❌ Severe ⚠️ Low–Moderate Keys often have hardened steel tips (~5.5–6). Can scratch plastics easily, glass occasionally. Ceramics (tiles, mugs, sinks) ~6–7 ❌ Severe ❌ Severe Similar hardness to quartz; can scratch both. Diamond jewelry 10 ❌ Severe ❌ Severe The hardest thing you’ll encounter — will cut glass easily. In short: Plastic lenses (Mohs 3–4) are vulnerable to almost everything except very soft items (fingernails, cloth). They need scratch-resistant coatings. Glass lenses (Mohs 6–7) are naturally resistant but not immune. Silica, sand, ceramics, and diamonds can scratch them. The number one real-world threat: sand. Anti-Scratch Coatings Explained The “hard coats” used on plastic lenses are usually siloxane or polysiloxane-based (a type of cured silica resin). They’re not as hard as pure glass, but they bump the lens surface up to about 5–6 on the Mohs scale, depending on the formula and curing method (dip coat vs. spin coat vs. UV cure). Maui Jim states that their glass lenses do not have anti-scratch coatings, while their non-glass lenses do. Why is that? Because the glass is already harder than the coating itself. Coatings can actually reduce durability. A scratch-resistant coating on glass could introduce adhesion issues, micro-crazing, or peeling over time. Since the coating would be softer than the glass, any scratch would still cut through it, and now you’d also have the risk of damaging the coating. The final polish step gives glass a hard, smooth surface that resists scratching better than any applied coating could improve upon. Anti-scratch coatings only make sense for plastics. For glass, they’re redundant (and possibly counterproductive), which is why brands like Bajio, Costa, Maui Jim, etc., never add them to their glass lens lines. How premium brands apply anti-scratch vs. budget sunglasses also makes a huge difference. Premium brands start with better base materials (e.g., Trivex, high-index, or glass), which already have stronger surface hardness. The hard coat is tuned to match the lens refractive index, so optics aren’t degraded. Lenses are fully submerged in a liquid polysiloxane (silica-based) resin. Excess drains off uniformly, then the coating is UV or heat-cured into a dense, glass-like surface. This ensures even thickness across the entire lens. A proper scratch coat is engineered to be compatible with AR and hydrophobic layers (so it doesn’t crack or delaminate). Premium coats are harder (Mohs ~6–7 equivalent) and thicker (~3–5 microns). That makes them much more resistant to micro-abrasions and swirl marks. Every lens batch is tested for haze, adhesion, and abrasion resistance (e.g., steel wool or Bayer abrasion test). Failed lenses don’t leave the lab. Cheaper brands like you will find for $20 on Amazon, Alibaba, fast-fashion brands, and almost anyone who uses TAC lenses use a different method. Instead of precision dipping, many low-cost lenses get a quick spray coat or a thin dip. Coatings may not be tuned to the lens’ refractive index, which can lead to glare, haze, or slight distortion. The coating is often <1 micron thick, so it wears off quickly. Inexpensive coatings may be air-dried instead of UV/heat-cured. This makes them softer and more prone to peeling or crazing. You can sometimes see rainbow-like streaks or thin spots under light, a sign the coating is inconsistent. Little to no abrasion testing is done. If the coating fails in weeks or months, the brand expects the consumer to buy another pair. Scratch coatings are often marketed in a way that makes people think their lenses are “scratch-proof.” In reality, no lens or coating is scratch-proof, not even glass. What these coatings do is reduce the rate and severity of scratches, not eliminate them entirely. They buy you time, not invincibility. A good scratch-resistant coating makes a lens far more durable in daily life (resisting swirls from cleaning cloths, micro-abrasions from dust, and casual contact with soft objects). But hard abrasives like sand, cement, or metal keys will still cut through. They won’t stand up to being dropped lens-first on a sidewalk or rubbed with grit. Scratch coats themselves are a surface treatment. With years of cleaning and handling, they can thin or develop micro-cracks. Once compromised, scratches can form more easily. This is true even of premium coats. Keep in mind, a scratch coating doesn’t make a lens tougher against cracks, chips, or deep gouges. It only hardens the surface against abrasion. Hydrophobic and oleophobic coatings (water and oil-repellent) don’t add scratch resistance but indirectly help prevent scratches by keeping lenses cleaner. By reducing smudges and making cleaning safer (less pressure, less wiping), there is less chance of scratches. These do wear off over time. Anti-reflective layers are softer than glass or hard coats and scratch more easily. Many scratches people complain about are actually on the AR, not the lens itself. Mirror Coatings and Encapsulated Mirrors Mirror coatings themselves are very soft compared to lens materials. They’re made of ultra-thin metallic or dielectric layers (aluminum, titanium dioxide, chromium, silicon oxides, etc.), often only a few hundred nanometers thick. On the Mohs scale, metallic mirror layers (Al, Cr, Ti) are generally 2–3 Mohs. Dielectric layers (SiO₂, TiO₂, MgF₂, etc.) can vary, but often ~4–6 Mohs in bulk form. But because mirror coatings are so thin and brittle, their effective scratch resistance is much lower than the raw mineral values. In practice, most mirrors scratch like they’re in the 2–4 Mohs range. That’s why even a tiny grain of sand or dirt can damage a mirror-coated lens almost instantly. When the mirror gets scratched, it is more noticeable than a lens without a mirror for two reasons. The first is cosmetic. The second is that it will mess with how light gets through the lens in that spot relative to the rest of the mirrored lens, and it will change the tint profile there. It will usually be tolerable for small scratches, but can get annoying for large scratches or accumulated ones. This is definitely a factor to consider when selecting lenses from a brand like Maui Jim or Serengeti, as they apply their mirrors on the exterior of their lenses and they do not resist scratching like the glass lenses underneath. Keep in mind though, that a mirror on a glass lens will still be functionally more scratch-resistant than on a non-glass lens because the substrate is so much harder. Some brands use encapsulated mirror coatings, meaning the reflective oxide layers are applied under the front layer of glass, rather than sitting exposed on the outermost surface. Brands like Costa, Bajio, Otis, and Revo claim to use this structure for their glass lenses. The mirror coating itself doesn’t become harder or more scratch-resistant when it’s encapsulated. Its Mohs hardness doesn’t change; it’s still a very soft, fragile, thin film. What changes is where it sits: instead of being exposed to the environment, it’s sealed under glass. That means everyday hazards (sand, dirt, microfiber grit, sunscreen, sweat) never directly contact the mirror layer. This allows for better cosmetic longevity and less annoying distortion, even though the lens as a whole is still only as scratch-resistant as its outer glass. By the way, the reason Oakley lenses scratch so much is a mix of all the reasons discussed so far. They use very scratch-prone polycarbonate lenses with very brittle metal oxide mirrors with no anti-scratch coatings on top (except on prescription lenses). Myths About Fixing Scratched Lenses There’s a lot of DIY advice floating around online about “fixing scratches” on sunglasses or eyeglasses. Most of it recommends household products like toothpaste, baking soda paste, or even car wax. These are all dumb. Toothpaste and baking soda work by grinding away material, which is fine for polishing teeth or sinks, but terrible for lenses. On plastic lenses, they actually remove part of the hard coat or AR layer, leaving the lens more exposed and easier to scratch. On glass lenses, they can cause fine hazing that permanently lowers clarity. DIY abrasives strip these coatings off unevenly, which can create rainbow patches, peeling, or cloudy spots. It is part of the lens structure missing. Toothpaste or anything else doesn't replace that in any way. It will not "buff out". Even if it could, it would alter the curvature of the lens and its corrective power (0 is also a corrective power). If it’s done unevenly (and that means up to 0,01 mm), you’ll get a laughing mirror effect ( distorts a person's reflection to create an altered image) when looking through the lens. To do it without changing the corrective power of the lens would require computer-guided CNC equipment, and even then, you’d be left with an uncoated lens that would scratch again very easily. Once coatings are compromised, they can’t be reapplied at home. Proper Cleaning Methods If there is sand on a lens and you wipe it with a cloth, you are wiping sandpaper on your lenses. So please, if your lenses are dirty with actual dirt and not just grease, clean them properly. Step 1: Rinse under lukewarm water. This removes the sand, dirt, dust etc, without rubbing them against the lens. Step 2: Use lens cleaner or mild dish soap. I use Palmolive for what it's worth. This helps get rid of the grease. Step 3: Wipe with a clean microfiber cloth. Not a towel or paper towel. Not a shirt. Microfiber clothes usually come with any glasses or sunglasses you bu,y or you can get them fairly cheap from Amazon. I use these . Dry wiping your lenses is a bad idea, at least if you do it too much. Lenses pick up microscopic particles of dust, dirt, and sand throughout the day. Many of these are made of silica or quartz (Mohs 6–7), which is as hard or harder than glass. When you wipe a dry lens, those particles get dragged across the surface. At first, you won’t notice much. They are just “micro-scratches.” Over time, these create haze, glare, and reduced clarity, especially when light hits the lens at night or from the side. Scratch-resistant, AR, and hydrophobic layers are thin. Dry wiping slowly polishes them off, leaving lenses more vulnerable. Microfiber cloths are the safest way to clean lenses, but only if they’re clean themselves. Over time, a cloth picks up dust, oil, and microscopic grit. If you keep using it without washing, that cloth basically turns into sandpaper in disguise. Just wash them with mild liquid detergent in warm water (no fabric softeners or bleach, they clog fibers). Storage & Handling I'm not going to drag out this way-too-long article too much, so here are the basics of storage. As Rob Tavakoli from SportRx says, "On your face, or in the case, so you don't have to replace". Always use a case (hard cases are best). Never put lenses face down. Avoid leaving sunglasses loose in bags or car dashboards. Heat damage can soften coatings and make them more prone to scratches. I'll do another post elaborating on some of these points. What To Do If Your Lenses Get Scratched No matter how careful you are, scratches happen. The important thing is knowing the difference between scratches you can live with or when it’s time to replace the lenses. Cosmetic scratches are just small, light marks that don’t affect clarity. These are usually only visible in certain lighting angles and don’t alter how you see through the lenses. Don't worry about them. Vision-impacting scratches are deeper scratches that scatter light, cause glare, or create distortions in your vision. On mirrored lenses, even small scratches can be distracting and very noticeable. The rule of thumb is that if a scratch interferes with your ability to see comfortably, it’s time for a fix. Warranty replacements will not generally get you far. Most premium brands cover manufacturing defects but not everyday wear and tear. They know the lenses will likely get scratched. Still, it’s worth checking what they can do for you because sometimes brands will offer a discounted replacement if the damage is beyond repair. Top-tier sunglass makers like Maui Jim and Costa have formal replacement lens services. You send in your scratched sunglasses, and they’ll install brand-new factory lenses for a fraction of the cost of a new pair. This option preserves the integrity and optical quality of your sunglasses. You know you’re getting the same tech you originally paid for. For brands that don’t have an official replacement program, you can look into aftermarket lens makers. Quality varies widely. Some aftermarket lenses can be decent, but they rarely match the optics of premium originals. Make sure to still get lenses with at least an anti-reflective coating. Some options are Tajima Direct, Fuse, and Revant. Final Tips Even the toughest sunglasses need care. Developing a few small habits can make a big difference in keeping sunglasses like new. The most important one is to rinse your lenses before wiping them. Dust and sand are harder than most lens materials and can act like sandpaper if rubbed across the surface. Another good habit is to always keep a case handy. Dropping your sunglasses in a bag, on a car seat, or worse, in a pocket with keys or coins is one of the fastest ways to scratch lenses. Remember that no coating or material makes a lens invincible; even glass can be scratched by quartz sand. The best mindset is to treat sunglasses as precision optics, not just fashion accessories. With a little extra care, you’ll prevent scratches on sunglasses and get years of clear, comfortable vision. Conclusion - The Complete Guide to Sunglass Lens Scratching and How to Avoid It Lens scratching is the most common and often most frustrating issue for sunglasses, but understanding the science behind it makes prevention much easier. From knowing the hardness of your lens material and coatings to recognizing the real threats like sand, dirt, and hard minerals, small habits go a long way in protecting your optics. Proper cleaning, safe storage, and thoughtful handling can extend the life of your sunglasses, while replacement lens programs from premium brands offer a reliable path if scratches do occur. Remember, no lens is invincible, but treating your sunglasses as precision optics rather than just accessories will keep them looking and performing their best for years to come.

A lot of cheap sunglasses brands and dropshipping companies use lenses made from TAC (Triacetate Cellulose). While they may seem like a good deal, here’s why you should avoid them. What are TAC lenses, and Why are they a Problem? Triacetate Cellulose is a chemical compound made from cellulose and acetate esters. It’s commonly used for fibers, films, and membranes—but as a lens material, it’s essentially a cheap, clear plastic base. The base material is the cheapest and worst possible: No inherent UV protection – A UV-blocking filter must be added. Mediocre optical clarity – Around Abbe 38, which is better than polycarbonate but worse than any other lens material. Poor durability – TAC is not particularly impact or scratch-resistant, and it gets worse. What TAC can  do well is hold laminated coatings, which is why you’ll often see TAC lenses marketed as "multi-layered polarized composite." But this is misleading: it has to be multi-layered because, on its own, TAC is useless. UV, polarization, Tint, Anti-scratch etc all need to be added to the lens. Those additions are also very cheap and easy to do with TAC. They require a tint coating, scratch coating, and other layers just to function. This kind of information is wrong and misleading: Durability Issues TAC lenses have major flaws that make them a poor choice for long-term use: They delaminate over time, especially with exposure to heat, humidity, and sweat. If you see a pair of sunglasses getting bubbles and peeling, most of the time you are seeing a TAC lens. The polarization film can peel off, making them unreliable. They are brittle compared to CR-39, Trivex, or polycarbonate, making them more prone to cracking. Coating wear degrades optical clarity, leading to inconsistent glare reduction. Some cheap TAC lenses don’t even provide real UV protection—just dark tinting, which is dangerous because it dilates pupils without actually blocking harmful UV rays. Are you going to get $20 sunglasses tested for UV protection? Why Are They So Cheap? TAC lenses are cheap because they’re easy to produce. The material is derived from cellulose (from wood pulp or cotton), which is abundant and inexpensive to process. Compared to polycarbonate or CR-39, TAC lenses require fewer production steps and less advanced technology. That's why almost all cheap pairs you will find online have them. That’s why no serious brand uses TAC when better materials like CR-39 or polycarbonate are available. If a brand is marketing TAC as a premium material, it’s a red flag . At best, TAC makes sense for sunglasses under $20—but even then, polycarbonate is preferable. It is annoying for me to find sunglasses for my young kids that aren't TAC. I know my kids will destroy them but I still want the impact protection and relative durability of a polycarbonate lens that is not and should not be that expensive. None of the brands we review at Sunglass Science use TAC lenses. Do yourself a favor and get a pair of sunglasses made from premium materials, with proper construction, that you will enjoy and will last you for many years.

Maui Jim does not offer prescription sunglasses through their own website, even though they are the ones that make the actual prescription lenses. Instead, they use dealers who can do a better job of caring for customers. Most of those dealers are brick-and-mortar stores and eye doctors. But in the digital age, many people want to buy premium lenses from brands like Maui Jim online. As of writing, there are only a few websites that have partnerships with Maui Jim to provide dealer services for prescription, and none are better than SportRx. The reason that Maui Jim avoids selling prescription directly is that fit, measurements, and troubleshooting require expertise that is generally a headache to sell online. That’s why they rely on trusted dealers who specialize in taking those kinds of orders. When it comes to prescription sunglasses from Maui Jim, the product itself is entirely from Maui Jim. Maui Jim makes their own prescription lenses in-house, unlike many other sunglass brands that outsource. This means the quality, polarization, and lens colors are identical to their non-prescription versions. So what you want from your dealer is to get the order correct and to provide the best possible customer service. That is where SportRx thrives, and Maui Jim has told me themselves that they love working with SportRx, who are industry leading in making customers happy. This is for two reasons. One is experience, which they have plenty of. Getting a prescription online is a bit tricky, because there are other measurements other than the prescription and PD that are involved in getting a lens and frame to fit a customer properly. SportRx knows how to get this as correct as possible because they have worked with each frame and lens so many times. The second advantage SportRx has is their commitment to making sure a customer is happy. I explain here all the benefits there are of using SportRx, but short of it is that no matter what issue comes up, you can be absolutely sure they will go out of their way to make you a fan for life. Buying Maui Jim prescription sunglasses online through SportRx comes with the same, or better, manufacturer’s warranty and authenticity guarantees as buying from an eye doctor. You can check out our reviews for each Maui Jim lens to know which one is right for you. Some notes about Maui Jim prescription: They do not do prescriptions in glass. They used to, but the turnaround time was too long, and the cost for the customer was too high. They also do not do prescriptions in MauiPure. The lens material options for prescription are polycarbonate, Maui Evolution, or MauiBrilliant. I know that MauiBrilliant is the most expensive, but it is a noticeable step up from the other materials. Also, the mirrored lenses like Blue Hawaii and Hawaii Lava are only available in MauiBrilliant. Single vision and progressive lenses are all compensated for wrap and base curve, allowing the wearer to see accurately throughout the lens with distortion-free, edge-to-edge clarity. Check out Maui Jim on SportRx, the best place to get Maui Jim prescription sunglasses online. Use code SCIENCE10 for $10 off your purchase.

This website exists to help people find sunglasses that work best for them. I make money through commission income when someone clicks a link and buys a product. If that product is returned, I get nothing. So, the only way I succeed is by making sure my readers are happy with their sunglasses. There are plenty of companies I could link to—some massive, some niche. Many have offered me higher commission rates to send traffic their way. But when SportRx reached out and offered to partner with me, I was more than happy to work with them. Let me explain why I recommend you buy sunglasses from SportRx. Use code SCIENCE10 for $10 off your purchase. My Experience with SportRx I have a personal connection to SportRx. When I first got into sunglasses, their YouTube videos were one of my best sources of information. At the time, I needed prescription eyewear—a big financial decision, especially without insurance. I wanted to be sure I was getting the right lenses for my needs. I contacted SportRx and explained what I needed: what activities I’d use the sunglasses for, where I lived, and whether I should go with polarized or non-polarized lenses. Their team helped me break down all the options and figure out what would work best for me. When my lenses finally arrived and I took them to play tennis, I wasn’t just sold on SportRx—I was hooked on exploring the world of sunglasses even further. (Also, months later, I asked them nicely for some extra lens bags, and they sent them to me for free. A small thing, but it stuck with me.) Why You Should Buy from SportRx The main reason I partner with SportRx is simple: I want my readers to be happy with their purchase. And SportRx makes sure of that better than anyone else. Their return policy is unbeatable.  If you're not completely satisfied with your eyewear, you have 45 days to return it for a full refund or exchange. If your prescription changes, they’ll remake your glasses within 60 days. And in the U.S., return shipping is free. [See the full Remakes and Returns policy here.] Regular shipping is also free in the U.S., and they ship internationally, too. They accept FSA, HSA, and out-of-network vision insurance.  That’s a big deal if you’re looking to use pre-tax dollars or get some reimbursement. They actually help you choose the best lenses.  Unlike other sellers, SportRx has a team of opticians ready to chat, call, or email. No frustrating menus, no automated nonsense—just real experts who care about getting you the right pair. They’re a great company, run by good people.  SportRx is based in the U.S. and takes care of both its customers and employees. They have experience with all activities and scenarios, and they work with professional athletes from all sports. I've met them, and they are the real deal. Ordering is easy.  They carry a wide range of sunglasses, including non-prescription ones that ship quickly. If you need prescription lenses, all you need is an up-to-date prescription, and they handle the rest. If you're serious about getting the best sunglasses for your needs, SportRx is the best place to buy from. What SportRx offers SportRx carries a massive selection of sunglasses from the best brands—Maui Jim, Serengeti, Dita, Oakley, Costa, Ray-Ban, Wiley X, Rudy Project, and more. You can buy them as-is or customize them with prescription lenses. If you need prescription sunglasses, SportRx is one of the few retailers that makes the process easy and actually helps you choose the right pair. Most online stores just sell stock lenses, but SportRx offers custom prescription lenses built for your exact needs. This includes: Single vision & progressive lenses  – Whether you need distance correction or multifocal lenses, they’ve got you covered. Authentic brand prescription lenses – Get genuine prescription lenses directly from top brands like Maui Jim, Costa, Serengeti, Oakley, and more. Sport-specific lens customization  – Different sports demand different optics. They can optimize lenses for cycling, golf, fishing, skiing, and more. Lens material options  – Polycarbonate, Trivex, glass, and high-index materials are all available, depending on what balance of clarity, impact resistance, and weight you want. Tints & coatings  – Choose from polarized, photochromic, mirrored, or color-enhancing lenses. Mirrors? Anti-reflective coatings? Scratch resistance? You can fully customize your lenses. SportRx doesn’t just sell everyday sunglasses—they offer: Ballistic-rated eyewear  for military, law enforcement, and shooting sports. High-impact safety glasses  for work and industrial use. Prescription ski goggles, cycling glasses, and water sports eyewear  for serious athletes. They have worked with top-level athletes from baseball to golf to cycling. Conclusion - Why I Recommend You Buy Sunglasses From SportRx At the end of the day, my goal is simple: to help you find the best sunglasses for your needs. I don’t push brands because they offer higher commissions, and I don’t recommend products I wouldn’t wear myself. The only way I succeed is by making sure my readers get sunglasses they’re truly happy with. SportRx is one of the few retailers I trust to do right by their customers. They have the selection, expertise, and policies to make buying sunglasses—especially prescription ones—completely stress-free. Their team of opticians actually helps, their return policy is one of the best in the industry, and their commitment to quality is obvious. If you’re looking for top-tier eyewear with real support behind it, SportRx is the best place to buy from.

Dink Eyewear’s ColorBoost™ Violet lens is one of the boldest I’ve tested. With a 30% VLT and intense spectrum manipulation, this is not your average sunglasses lens—it’s built for people who want contrast cranked to the max. Check out Dink lenses here . Use code " SUNGLASSSCIENCE10" for 10% off. If you want to know more about how rose lenses work, click here . In This Review Lens Specs How does the lens look? What does the view look like? Sunny Condition s Optimal and Suboptimal Viewing Conditions Comparison to the same brand lenses - Dink Eyewear Comparison to Rose/Violet Lenses of Different Brands Conclusion: Dink Eyewear ColorBoost Violet Sunglasses Lens Review - Should you buy it? Lens Specs Dink Eyewear ColorBoost™ Violet Technology ColorBoost ™ Lens Color Violet Mirror Color NA VLT 30% ABBE 30 Coatings Anti-reflective, Anti-scratch, and Hydrophobic Material Polycarbonate Weight Light Scratch Resistance Moderate Prescription Available Yes Dink didn't want to mess around with the lenses, so they get their pro versions from ColorBoost ™ , a lens maker that specializes in manipulating the light spectrum to boost color and contrast. They come with all the main coatings, including anti-reflective. The lens is not polarized, which is better for ball sports . Is it eligible for prescription? Yes, in single or progressive, from Dink's website . Use code "SUNGLASSSCIENCE10" for 10% off. How does the lens look? The front is a purple/violet hue. It is only a 30% VLT, so the eyes will be visible most of the time. The lens looks pretty cool to wear, in my opinion. The tint is purple, not rose (meaning more blue and less red than a rose lens). This makes it a mix of red and blue with very little green, and we will see how that affects the view in the next section. What does the view look like? There are several important things to know about the violet lens. First, the tint. It's violet, which by itself is already an interesting view. It is essentially a mix of red and blue, but unlike rose, which leans red, violet leans more blue. This means there is a dual hot/cool sensation, and a dual contrast/dulling effect. I include pictures in the next section, but it's hard to understand without trying yourself. The view with this kind of violet lens takes a few minutes to adjust to. Don't rip these off after a few wacky seconds, let your eyes settle. The sky is a brilliant blue and reds are glowing, but it's everything else that our brains need the most adjusting to, because of the huge color shifts. As if that wasn't enough, ColorBoost™ used proprietary dyes to amp up the contrast, essentially fine-tuning certain parts of the light spectrum (which were already significantly altered by the tint) even more. This sharpens colors further, like everything is glowing somewhat. It's a bit otherworldly. If you like what Oakley did with Prizm, especially the more intense lens options, you will probably like what ColorBoost™ is doing, because they take it even further. The effects are so pronounced it's hard to forget you are wearing sunglasses, but it's hard to stop marvelling at the result. It's not for everyone, but a lot of people will enjoy this. The last aspect to keep in mind is that this lens is a Category 2, 30% VLT lens, which is not a dark lens. You can still wear it in full sun, as it will be better than nothing, but it will be bright, and the color and contrast effect will be at their highest levels. Again, some people will love that, some won't (and might prefer Dink's other, less intense lenses). The VLT level of this lens is ideal for bright thin clouds, adding contrast and color and a better light balance. It has that “HD Vision” feel you sometimes get from rose-copper lenses, but with a cooler tint and more purple-blue skew. It’s a noticeable change—some people will love it instantly, while others might need a few wears to adjust. Sunny Conditions These photos are what I have used to show the view. Keep in mind that photos will never look as good as the real view  looking through the sunglasses with your own eyes. Interested in experiencing the Dink Violet lens for yourself? Check out the lens here . Here is my simulation of how the lens looks: A bright day with direct overhead sun, washing out all colors and reducing visibility. The Violet lens makes everything glow with color. Reds are much redder, blues are prominent, but the whites are what stand out the most, not an easy thing to do with most lenses. The yellow/green pickleball is much brighter, though the darker green trees in the back are reddened and somewhat yellowed. Constrast that with a darker grey lens and it feels like another world: Optimal and Suboptimal Viewing Conditions This is a functional lens, not a standard one. You won't want this as your only pair of sunglasses, and it won't be your daily workhorse, but you will want this if you want to add a punch to your view. On full-sun days or near water, it can feel a little thin, especially compared to darker options. That said, if you’re not light-sensitive and just want a more vivid world, it still works, even in full sun. For 1-2 hours, playing pickleball or tennis in bright conditions? These are fine, a bit bright, but very functional and will make the court and ball much easier to see. (I'm a tennis guy, but that's close enough to properly review pickleball lenses.) These are better in bright haze or low and thin clouds. This is where the violet lens shines. On overcast days, late afternoons, or shady trails, it boosts contrast and brings the environment to life. It also works well in spring and fall light conditions, when the sun is lower and skies are variable. I didn't like them as much in thicker clouds, because even with the higher visible light transmission, I prefer a redder, rosier lens, as the added blue of the violet lens didn't sit as well with me in those conditions. But that is subjective, and I imagine others might feel differently about that. Either way, it wasn't a bad view, and it stayed functional through all conditions. It’s not your everyday sunglass lens, but it’s perfect for people looking for visual excitement and boosted contrast in soft light. Comparison to the same brand - Dink Eyewear For these comparisons, I will only be comparing other non-polarized options, though Dink has several polarized options to choose from, including a rose lens, which is in the same family as Violet. Dink ColorBoost Outdoor Green A dark green lens (14% VLT) with the ColorBoost effects added, this lens is more comfortable to wear in full sun than the Violet, but not as usable in overcast weather. If you like a dark green saturated and boosted lens, this might be the one for you, and it can be used as a daily pair as well, adding to its versatility. Dink ColorBoost Outdoor / Indoor Green With a VLT of 39%, but still green, this lens is an attempt to do it all, and it sort of ends up doing everything just fine. It's not too dark for indoors, but it's dark there, and it's not too bright for outdoors, but it's pretty bright. Green is generally better for sunny and colorful places. This lens thrives in bright early mornings or bright overcast. Dink Standard Outdoor Green This is Dink's entry-level, more budget-friendly lens option. It is not a ColorBoost lens. It is a fine, standard green lens that gets the job done on sunny days. They also make a lighter version for indoor use. Comparison to Rose  Lenses of Different Brands Maui Jim MauiGreen MauiGreen is the closest Maui Jim lens to the Dink Violet lens. It also has an interesting blue/red mix to it that some people love. The MauiGreen comes in glass, is polarized, and is a darker lens. See here for the full review . Oakley Prizm Road Prism Road is Oakley's most violet lens; most of the Prizm Sport lenses are more rose. Even the Road lens is rosy compared to the Dink Violet. The Road lens is darker, has a red/blue mirror, and is a more natural view compared to the Violet, without as much color punch. Conclusion - Dink Eyewear ColorBoost Violet Sunglasses Lens Review -  Should you buy it? The ColorBoost Violet lens from Dink Eyewear is not subtle—but that’s the point. If you're looking for a lens that transforms your view with saturated reds, glowing blues, and sharp contrast, it absolutely delivers. It’s not ideal for harsh full sun or gloomy overcast, but for bright haze, light clouds, or recreational sports, it's a fun and functional option. Some may find it too intense for everyday use, but for those chasing a unique visual experience, this is a lens worth trying. Use code "SUNGLASSSCIENCE10" for 10% off.

In this Article: Introduction TL;DR (Too long; Didn't read) Adjusting to Changing Brightness Adjusting to Changing Colors Adjusting for Differences in Lens Material and Coatings Conclusion Introduction The ultimate prize in the sunglass industry is the ability to see how a lens will affect the view. Opening up a website and comparing different lenses for yourself would be an amazing tool to use. However, it cannot be done. Let me explain why. TL;DR A short summary, in case you just want the explanation without all the details. A camera has a sensor to record what comes through the lens that cannot adjust brightness and color rendering nearly as well as our brains. The pupil behaves in the same way as the adjustable camera aperture, regulating the right amount of light entering the eye. However, it can adjust to the perfect light allowance faster, more frequently, and more accurately than any camera can. Rods and cones in our eyes, responsible for nighttime and daytime vision and color vision, allow our eyes to adapt to various lighting conditions in detail that camera sensors cannot replicate. Adding sunglasses significantly alters the amount of light reaching the camera or our eyes, but our eyes and brains can quickly adapt, while the camera needs to be significantly recalibrated. More importantly, a camera has "white balance" (adjusting color temperature to capture true colors, making whites appear truly white) but not color memory. Color memory refers to how we remember how objects are supposed  to look and adjust subconsciously so they appear  correct. Unlike a camera, which captures a full-color image at once, our eyes and brain build and update the image over time. Technically we all see color slightly differently because our memories and brains are different. Putting on a sunglass lens that alters colors will confuse a camera, while our brains will quickly adjust to rebuild our color vision to the appropriate balance. This is also why it's important to wear a new lens for a few minutes when trying them on, to give time for our brains to customize the colors correctly for us. We can also perceive the difference in clarity and color rendering between different lens materials and coatings. A camera cannot discern the difference between glass, nylon, polycarbonate, or plastic lenses. The contrast for us can be very noticeable. Therefore a camera view will never be an accurate representation of how we would see the sunglass view with our eyes, and that's why no brands use them to show it. They all use before and after pictures edited in image processors. That's the best we can produce currently, to recreate the picture and color from our memories. But even then, our conscious memory will never do a good enough job rendering the colors and lighting as compared to our subconscious. Even if the colors were perfectly on point, the limitations of screens to view the image wouldn't do justice to what our eyes can do. The view will always be better in person, so if you like how you see it in the picture you can be sure you will like it better in the real world. If you want to understand this in greater detail, read on. Adjusting to Changing Brightness When we go outdoors in the middle of a clear day, the amount of light around us is overwhelming, and that's why we squint. How much brighter is it outside than inside (assuming a sunny day vs a brightly lit office)? Would you believe it's over 100x brighter!? Even outdoors in the shade, it is over 50X brighter than indoors. Our eyes adjust so quickly to the difference that we have a poor sense of the magnitude of light change between indoors and outdoors. (It's not that people are terrible at perceiving brightness, it's just that brightness perception (like loudness) is logarithmic. So if a person says it is 2x brighter outside, and a linear measurement instrument says it is 100x brighter, that is roughly consistent.) When we put on a pair of sunglasses, there is an immediate reduction in the amount of light entering our eyes. Most sunglasses have a visible light transmission (VLT) of 10-20%, meaning the amount of light coming through the lens is reduced by 80-90% compared to what we see without the lenses. Our brains and eyes very quickly adjust to this. For example, no camera has Region-Adaptable ISO which would let more or less light in depending on where it is in our vision and how much light our brain thinks it needs. This is why photographers have always had to modify light or burn-and-dodge. Our retinas can vary their sensitivity by region. They drop the sensitivity for a bright sky and increase it in a dark foreground. Look out a window and close your eyes. See the fuzzy negative image? That's the map of where your eye has varied its sensitivity (an unsharp mask) to let you see out the bright window and inside your house, both at the same time with full contrast, which no camera can do. While the iris structure is known for providing the color or pigment of the eyes, it is also made up of miniature muscles that work in tandem with your pupils. As the gatekeepers, these two regulate the right amount of light entering the eye. In dim lighting, the muscles relax, allowing the pupil to dilate allowing more light to enter. In bright environments, the muscles contract causing the pupil to constrict, minimizing the amount of light needed to focus. Once the light enters the eye through the circular pupil, it is filtered through the retina onto light-sensing cells that line the back part of the eye called photoreceptors. These are divided into two groups according to their shape and function:  ·         Rods:  responsible for nighttime vision, has a low resolution but is more abundant.  ·         Cones:  contribute to daytime vision, are responsible for color vision and are fewer in number.  Combining these two cell receptors’ functions allows our eyes to adapt to various lighting conditions–with the retina switching the workload between the rods and cones based on the amount of light that the pupils let in. A camera does have several ways of adjusting the amount of light coming through, but none are sophisticated enough to replicate what the eyes are capable of. A camera regulates how much light comes in through several mechanisms: 1. Aperture: The aperture is the opening that controls the amount of light that enters the lens. A larger aperture (smaller f-stop number) lets in more light, while a smaller aperture (larger f-stop number) lets in less light. 2. Shutter Speed: The shutter speed controls the duration of the exposure. Faster shutter speeds allow less light in, while slower shutter speeds allow more light in. 3. ISO: The ISO setting controls the camera's sensitivity to light. Lower ISO settings (e.g., ISO 100) are less sensitive to light, while higher ISO settings (e.g., ISO 6400) are more sensitive. 4. Neutral Density (ND) Filters: ND filters reduce the amount of light entering the lens without affecting the color or quality of the light. 5. Polarizing Filters: Polarizing filters can reduce glare and reflections, which can also reduce the amount of light entering the lens. 6. Lens Hood: A lens hood can reduce lens flare and glare, which can also reduce the amount of light entering the lens. 7. Camera's Auto Exposure (AE) System: The AE system automatically adjusts the aperture, shutter speed, and ISO to achieve the proper exposure based on the lighting conditions. 8. Exposure Compensation: This feature allows the photographer to intentionally overexpose (brighten) or underexpose (darken) the image, which can also regulate the amount of light coming in. A skilled photographer can use some or all of these to get the lighting as close to perfect for a shot. However, the photographer will always be comparing what the camera is producing to what they are seeing with their eyes in real time. The image we make in our heads is always the standard on which we judge any picture. Adjusting to Changing Colors Our eyes and brains have the ability to interpret color in a far more advanced way than cameras do. Our visual system has mechanisms to maintain color constancy, which is the ability of our visual system to maintain a consistent perception of color despite changes in lighting conditions. We can do this in a relative, subjective, and ongoing manner, for each detail in our visual scene. The human vision system is complex, involving both photo-receptors and neurons in the eye, along with intricate processing in the brain. The main receptor of information from the retina is the lateral geniculate nucleus, located in the thalamus near the center of the brain. This nucleus routes information to the primary visual cortex and other visual areas. The primary visual cortex processes this information into a three-dimensional model of the world. For this question, areas V2 and V4 are important. Cells in V2 process orientation, spatial frequency, color, depth perception, and motion. Together with the primary visual cortex (V1), V2 registers wavelength, hue, and luminance. At this level, the brain likely performs a "white balance adjustment" similar to a camera, normalizing each channel, though it is more complex and dynamic. It's V4 that does the real trick. V4 handles color consistency based on color memory. We remember how objects are supposed to look and adjust subconsciously so they appear  correct. For instance, we know roses are red, snow is white, and certain fruits have specific colors. Research supports this, showing that humans have "memory colors," for example, for skin tones, which is why accurate white balance is crucial in portraits. The fovea, the part of the retina creating the sharpest image and most sensitive to color, covers only one or two percent of the retina. Unlike a camera, which captures a full-color image at once, our eyes and brain build and update the image over time, with the fovea being crucial for high visual acuity tasks like reading and recognizing faces. With cameras, current object recognition and processing are insufficient to implement this effectively. The tool most used is called "white balance". In non-technical terms, white balance is how warm or cool the overall colors in your photograph look. Your camera is pretty good at reproducing color because it has the ability to analyze the scene and compensate for overly warm or cool colors. Usually, colors in your photos will look pretty close to the way they looked in real life. However, your camera is easily confused and can sometimes make the colors too warm or too cool. The most obvious place to spot this problem is the parts of your scene that are, or should be, white. When you take a photo by candlelight, sometimes the whites will look kind of yellow or orange. On a cloudy day, or when you’re in heavy shade, the whites might look a little blue. This is called a “color cast,” and it happens because the color of the light source varies. This warmth or coolness in the colors is referred to as “color temperature”. Your brain automatically deals with color cast, so it’s not something you’ll notice unless you’re looking out for it. However, your camera isn’t as smart as you and often needs your help. Most cameras default to the “Auto” white balance setting, which works pretty well, most of the time. In auto white balance mode, your camera examines the scene you’re trying to photograph and chooses a color temperature (in Kelvin) it thinks will work best. However, your camera can easily get confused if the scene: • Doesn’t contain any colors which are white, or close to white. • Contains mostly one color (e.g. a lot of green grass, white snow, blue sea or sky.) • Is illuminated by multiple light sources with different color temperatures. • In our case, if you add tinted sunglasses in front of the lens. Though we can alter an image in post-processing, it is nearly impossible to match what our brains can produce. Without a known neutral reference, we rely on simple auto-white balance, presets, and manual adjustments, using our own memory colors. Automatic white balance could work similarly by comparing scene information to a database, like "matrix metering." However, current object recognition and processing are insufficient to implement this effectively. Maybe one day this will change. Adding a tinted sunglass with subtle color-enhancing light filtering technology makes this difference even more pronounced. Our eyes and brains may take minutes to process the differences in color cast to remake our vision in a way our brains feel comfortable with, but a camera can be completely overwhelmed with the color shift. Adjusting for Differences in Lens Material and Coatings Another issue that cameras cannot handle is the subtle differences between lens materials and coatings. We can perceive the difference in clarity and color rendering between various lens materials and coatings. Even though some plastics or other materials are almost as clear, glass has superior chromatic aberration. This makes colors more authentic and pleasing to look at. A camera cannot discern the difference between glass, nylon, polycarbonate, or plastic lenses. The difference in perception is too subtle for the sensors, as we have magnitudes better depth perception and "resolution". This is especially true of looking at the image on a screen, which is the goal of capturing it on camera. Screen resolution has progressed rapidly in recent years but it will never have the "resolution" and clarity of seeing with your eyes. What we see on any monitor will always be compared to what we see with our eyes, and it will never be a perfect copy. With sunglasses on a screen, we are looking at a screen showing us what a camera sees through a sunglass lens, an extra two steps removed from looking through the sunglasses yourself. Conclusion: Seeing the Sunglass View with a Camera In conclusion, it's impossible to accurately show how a lens will look through a camera or computer screen. Our eyes and brains work together in a way that's hard to replicate with technology. While cameras can take great pictures, they can't match the complexity of our vision. We here at Sunglass Science try our best to show and describe the view in the most accurate way we can, but nothing beats the real thing. So if you're thinking of getting new sunglasses, don't just rely on digital images - try them on and see for yourself.