I do have a question about the heat.. Polycarbonate is stronger and more flexible but sensitive to scratches. Press question mark to learn the rest of the keyboard shortcuts. They are very light and therefore comfortable to wear. Width and Weight. New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. Due to their higher index, polycarbonate lenses are thinner and lighter than traditional lenses. Thickness: Polycarbonate lenses have a higher index of refraction than Trivex lenses, but not by much (1.58 vs 1.53). When eye safety is a concern, polycarbonate or Trivex lenses usually are the best choice for your eyeglasses, sunglasses and sports eyewear.. Creators use a mold to construct the lenses in much the same way regular plastic lenses for glasses are made. It is also found in eyeglass lenses, compact discs, dental sealants, and plastic dinnerware. Hello, I wanted to make sure that I wasn't being tricked into spending more money than necessary by optometrists (as I have been in the past). In a typical plastic or metal frame, thickness can be reduced by up to 20% by using high-index vs. polycarbonate lenses. But if you consider the lifetime cost of new polycarbonate lenses versus high index (say, $100 difference, new glasses every 4 years, live for another 40 years = $1000), it's not that much more money for high index (depending your your parameters for that equation). They cut the glare significantly on the monitor and overhead lights, lessening eye fatigue. Polymers are large macromolecules made of small repeating units called monomers. Polycarbonate lenses 1.59: These lenses are thinner and lighter than conventional plastic eyeglass lenses. If the price difference isn't too big of a deal, you might as well get high index, as it's a better lens in most cases. And polycarbonate lenses are 10 times impact-resistant than common plastic lenses. And polycarbonate lenses are 10 times impact-resistant than common plastic lenses. Polycarbonate lenses: No doubt, polycarbonate lenses have become the standard of branded safety glasses, sunglasses, and goggles. Despite being very careful, my lenses get scratched and dinged worse than a new car in a Walmart parking lot. Like the 1.61 and 1.67 high-index lenses, it has an aspheric surface, improving the wearer’s visual quality while reducing distortion of the wearer’s eyes as seen by others. Second, is the weight. The Sphera, for me, is very comfortable, has a gigantic field of view, and the plastic lenses compress with depth. Can shatter or chip easier than lenses made of other materials. polycarbonate lenses Polycarbonate Lenses are the most durable of all lenses. Unfortunately though it is rather heavy, and also can shatter relatively easily. Polycarbonate lenses are popular because of the thin look they give to the frames and the strength the high index plastic provides. Thickness: Polycarbonate lenses have a higher index of refraction than Trivex lenses, but not by much (1.58 vs 1.53). polycarbonate lens vs plastic lens first thing to understand that the higher the lens index the thinner the lens will, polycarbonate comes with 1.586 index and and normal plastic lens with 1.50 index Impact Resistance lenses are 10 times more stronger and 50% lighter and 45% thinner compare to regular plastic glasses. Polycarbonate lenses are made by injection molding. Lets talk about the 2 most popular options. :). … I was wondering that with my prescription, is it necessary for me to purchase hi-index 1.61 lens instead of polycarbonate lens? The monomers of polycarbonates are bisphenol A and phosgene. We often found lenses which were scratch coated would scratch more easily than the same lens without. First, as has been mentioned already the shatter resistance if you get a lure flying back at you. I recommend anti-glare/reflection coatings to everyone. There are a lot of great eyeglass lenses in the market, but before you buy a pair, it is imperative to consider both their pros and cons. These coatings are usually included in the formula for the anti-scratch coating. Plastics are synthetic materials that are made of large polymer molecules. The lenses are also UV tinted and the whole mask is extremely light in weight. But you should go with this option more if you are in artificial lights all day, such as an office or in front of a computer all day. Plastic vs. Polycarbonate Lenses Today we are going to be talking specifically about plastic vs polycarbonate lenses and what the major difference is between the lens materials. A lot of patients that go to our website, they see that we offer Plastic Lenses, Polycarbonate Lenses and Hi-Index Lenses. Hello! 01/27/2015. They’re also ideal for strong prescriptions since they do not add thickness when correcting vision, minimizing any distortion. Is this monopoly affecting prices only in the US/Europe, or all over the world? Trivex lenses: Polycarbonate Lenses vs Trivex Lenses . Answered by Dr. Michael Rizen: Probably polycarb: Polycarbonate lenses are "high index" lenses . Just like the 1.53 mid-index Trivex and 1.59 polycarbonate lenses, the 1.74 lens cannot be tinted. Besides, the polycarbonate lenses have UV protection themselves. How iCare does Eye Care for the Bronx. It’s not a matter of polycarbonate vs plastic, but rather who uses the best grade and type of polycarbonate, how they refine it, and what the final product looks and feels like in the hand. While they’re not the thinnest kind of lens out there, they still retain their position as the swiss-army-knife of eyewear lenses. It also scratches really easily, even with antiscratch on top. "polycarbonate vs plastic lenses best for high myope?" Polycarbonate lenses are ultra-durable, ultra-lightweight lenses. With a higher index (of refraction), light is bent more efficiently, therefore it requires less material to achieve the eyeglass prescription making the lenses … Polycarbonate lenses are less likely to fracture than plastic lenses or hi-index, so they are a great option kids’ glasses. Polycarbonate is a specific kind of plastic invented in 1953 by Bayer’s Dr. Hermann Schnell and General Electric’s Dr. Daniel Fox. About 25 to 40 percent thicker than polycarbonate and high index plastic lenses. It’s not a matter of polycarbonate vs plastic, but rather who uses the best grade and type of polycarbonate, how they refine it, and what the final product looks and feels like in the hand. You can Google Image search "lens thickness index" to see charts that give you a basic idea of the difference.As far as distortion, maybe? Essilor’s polycarbonate lenses are 20% thinner, 30% lighter, and 12x more impact resistant than standard plastic lenses. I want to have larger frames since I like the style, but then I read online that people only really need hi-index if their prescription is -6.00 or worse. Is one really better than the other? Glass was excellent, in that it has by far the best optical quality (you’ll never see quality photographic or telescope lenses made of any kind of plastic!). Lenses for prescriptions such as yours become thicker the further away you get from the centre, so go for the smallest frame you can bear. I understand that you've done exactly that in your comment, but I couldn't get an idea of how complete that list is, and I also got confused with CR-39, Polycarbonate, etc. The key difference between polycarbonate and plastic is that polycarbonates are lighter but, much stronger than plastic.. Polycarbonate and plastic are polymer materials. The monomers of polycarbonates are bisphenol A and phosgene. The monomers of plastic depend on the type of plastic; there are two … Finally, I saw this pretty crazy CBS documentary about the near-monopoly of Luxottica (Why are glasses so expensive?) It depends on your habits use for the spectacle. -- never heard those terms before. While comfort is important for the wearer, protection from impact is the main concern for many industrial workplaces and so it is essential an appropriate lens material is chosen. What are the benefits of glass lenses vs. polycarbonate lenses? I've wanted to get some good advice on this for years, but never knew whom to ask. Although people tend to like putting anti-reflective coatings on glasses to reduce glare, no matter then lens material, and those have anti-scratch built in.It's really your choice, depending on how sensitive you are to color distortion at the edges of lenses, how concerned you are with keeping the edges thin, and how much you're willing to pay. Well, plastic lenses are our basic lens. :) Polycarb is amazing overall. I love zenni for their selection, price and ease of purchase. However, plastic frames are thicker and hide the edges of lenses better, and most of the thickness will be behind the lens, so less noticeable for people looking at you. Both polycarbonate and Trivex lenses are thinner and lighter than regular plastic lenses. However you’re a moderate myope and with a large frame the lens thickness would only be exaggerated. I've bought about 8 pairs over the last few years. Thanks! Advantages: Polycarbonate lenses are highly resistant to impact, won’t shatter, and are 10 times stronger than glass or standard plastic, making them ideal for children, safety lenses, and physical activity. I generally recommended people with prescriptions anywhere between +/-0.50 to +/-4.00 to go with polycarbonate lenses. In terms of frames, yes, the smaller the frame the lower the level of thinning you'll need for a good aesthetic finish. If you have any more questions on lenses or the process, feel free to ask me. What are polycarbonate lenses? Polycarbonate lenses have an index of refraction of 1.59, and will generally be about 20% thinner than standard plastic lenses. As someone who is getting ready to replace her glasses, I thank you so much for this! However, thinner lenses won’t necessarily mean they will weigh less. So, It is a good idea to try them. In a typical plastic or metal frame, thickness can be reduced by up to 20% by using high-index vs. polycarbonate lenses. Technology is evolving, and like any new material that appears, trivex lenses bring an addition to the older polycarbonate eyeglass lenses. Some glasses I bought were bigger/smaller than the "dressing room" feature on the right hand side of the page would have you assume. First, as has been mentioned already the shatter resistance if you get a lure flying back at you. The lenses should be as easy to clean as possible (clean coatings on plastic lenses are better) Newest tech in terms of lens designs in most cases is available in plastic lenses only; When it comes to permanent tints and photochromic tints you will have more options with plastic lenses; Plastic lenses deliver higher impact resistance You are my hero. Don't be fooled. Dr. Michael Rizen answered. Probably polycarb: Polycarbonate lenses are "high index" lenses . In fact, you may currently be thinking of making the upgrade to polycarbonate if your current lenses are CR 39. The two most widely preferred lensesare CR 39 and polycarbonate. They are a lot less dense, and they don't chip as easily as a plastic lens. Polycarbonate lenses also provide you with protection from 100% of the harmful UV rays from the sun. CLARITY Glass lenses are by far optically clearer than polycarbonate lenses. What about glass lenses? I personally prefer plastic lenses over glass for 2 reasons. I live in Phoenix and leave my sunglasses in their case.. and leave them in the car all day long. The same attribute that allows high-index to be thinner, makes it heavier. Polycarbonate vs. CR-39: How to Tell the Difference. A Common Plastic Comes Under Scrutiny. Or is that not enough heat to cause problems? 20 years experience Ophthalmology. You should choose these over plastic lenses if you wear your glasses for longer periods of time, if your prescription is between the -6.00 to +6.00 range. Luckily, glasses wearers have options – Glass, Plastic CR-39, Polycarbonate, High-index 1.67, and High-index 1.74. It’s unavailable as a polarized or photochromic lens. I personally prefer plastic lenses over glass for 2 reasons. :(Nah, j/k. Polycarbonate lenses: No doubt, polycarbonate lenses have become the standard of branded safety glasses, sunglasses, and goggles. Helpful(0 ) Report Abuse. Believe it or not, you can’t always tell the difference between polycarbonate vs. CR-39 lenses at a glance. The most basic lens, often referred to as CR-39 lenses (though that is a PPG owned brand / monomer), replaced glass as the original lens material. It’s unavailable as a polarized or photochromic lens. My main gripe is scaling. They are used in countless applications within society, including appliance casing, carrier bags and spectacle lenses. They do have more chromatic aberration though. Polycarbonate Lenses vs Trivex Lenses . Second, is the weight. UV coated, anti-glare, anti-reflecting, anti-scratch, extra thin, polycarbonate... Do these really do anything? New comments cannot be posted and votes cannot be cast. I want my vision to be perfect but also am scared that hi-index lens may not be as safe. All in all I have zero complaints. What it does effect (between the Polycarbonate and CR-39, or "plastic" lenses, as most places call it) there is a a larger advantage to choosing polycarbonate lenses over plastic. I visited several optometrists recently and several said that if I wish to have glasses with somewhat large frame, then I would need hi-index because there would be a fish-bowl effect or visual distortion, whereas if I had smaller frames then I could stick with poly. Polycarbonate is a specific kind of plastic invented in 1953 by Bayer’s Dr. Hermann Schnell and General Electric’s Dr. Daniel Fox. The safety of hi-index lens as poly is shatter-resistant and more flexible but sensitive to scratches and most all... 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