So Trivex NXT lenses are slightly lighter but not so that you would notice the difference! Save my name, email, and website in this browser for the next time I comment. Ask doctors free. Trivex material provides high impact resistance. Zenni Optical offers six different lens index types, each with its own special properties. In high index 1.74 and 1.70, Trivex is generally a bit cheaper. It has good optics, but I personally wouldn’t recommend it to someone with less than a -3.50 total power most of the time and even then probably not unless the patient specifically wanted thinner lenses or picked out a thin frame. Required fields are marked *. Refractive Index Trivex lens material has a 1.53 index of refraction. This means how much the light that enters the lens is refracted (bent) as it passes through the lens. It covers SPHs of -20.00/+10.00 or lower and CYLs of +/- 6.00 or lower. This makes Trivex the lightest lens material. Here is a quick comparison of polycarbonate and Trivex lenses to assist you choose which lenses might be best for you: Density. acetone) while polycarbonate eyeglass lens is not. The higher the index, the thinner the lens … Is this wrong? Polycarbonate has a higher index of refraction than Trivex (1.58 vs. 1.53), so polycarbonate lenses are about 10 percent thinner than Trivex lenses. Trivex is a material developed for military purposes. Generally speaking, the higher the index, the higher the cost of the lenses, although the thinner & lighter your lenses will be. I'm also in this boat. Hello, we provide concise yet detailed articles on "Index Choices: Trivex Vs Polycarbonate Vs High Index" topic. So many variables play into the equation that, unless you’re an expert, you often don’t know what to choose in order to maximize your opportunities and get exactly what you want and need. Trivex material is one of the lightest lens materials on the planet. A lens with a higher index of refraction tends to reflect light more than standard CR-39 plastic or glass lenses. Standard plastic lenses have an index of refraction of 1.50, and glass lenses have an index of refraction of 1.52. Either has advantages and disadvantages. 2. Thank you for that info, it helps. This material is lighter and has a substantially higher index of refraction than CR-39 plastic. You seem knowledgeable on lenses. 2. Trivex has a lower specific gravity than polycarbonate, making Trivex lenses about 10 percent lighter than polycarbonate lenses. Thanks so much for reading! On the other hand, polycarbonate lenses have a higher index of refraction than Trivex lenses (1.58 vs. 1.53). I went with poly because I wanted the g15 really bad, New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. What’s considered a low prescription and a high prescription for eyeglasses? Ps. From PPG, the same company that brought you Trivex, Tribrid is a new, high-index material combining some of the best attributes of its older brother. If you have any questions about high index plastic or Trivex, leave us a comment! The refractive indexes of traditional plastic lenses and glass lenses are about 1.5 and 1.52 respectively. While most prescriptions are compatible with more than one specific index, it's up to you to decide which one fits your personal needs! Polycarbonate vs. Trivex Lenses: A Quick Comparison. When you find the article helpful, feel free to share it with your friends or colleagues. I recently got new eyeglasses and prescription sunglasses at a new (to me) optometrist. Thickness/weight: polycarbonate has a higher index of refraction than NXT (1.58 vs. 1.53) and a lower specific gravity than polycarbonate. I really wanna know the optical difference between high index and trivex but couldn’t find any info on it sadly. Trivex: How Does It Compare to High Index Plastic? The extra reflections are usually quite bothersome for the wearer especially at night and while using a computer monitor. Trivex is 16% lighter than CR-39, 25% lighter than 1.66, and 8% lighter than polycarbonate! Like polycarbonate, lenses made of Trivex are thin, lightweight but are even more impact-resistant than polycarbonate. A disadvantage is that high-index plastic lenses suffer from a much higher level of chromatic aberrations, which can be seen from their lower Abbe value. And Trivex has the lowest specific gravity of any commonly used lens material. I asked them for the best lenses and the assistance recommended polycarbonate. Option 2: Ultra Thin = 1.67 High Index Lens Price - £55.00; Option 3: Ultra, Ultra Thin = 1.74 High Index Lens Price - £135.00 . Both materials are excellent choices, with a plus for trivex eyeglass lens, especially the quality of vision and resistance, but also with a higher price. The lady at the doc told me she gave me Trivex and that Trivex is a 1.60 (which is a lie!) Glasses tend to get quite thick at high correction, especially some low index (1.50) lenses. This translates to a lens that is around 10% thinner. Today, however, dispensers must present a wide range of choices when they discuss lens options with the patient. Mid-index lenses, such as 1.54, 1.56, and 1.57, are thinner than glass, and nearly as strong as CR-39. High index lenses are classified by numbers that represent their refractive index and range from 1.64 to 1.74. and better than Poly. I would say anything under a -5.00 to a +3.00, Your email address will not be published. Another important property is that polycarbonate naturally blocks 100% UV light. Other high-index materials are classified by numbers. Meanwhile, shatter resistance is also in favor of trivex. Thickness: Polycarbonate has a higher index of refraction than Trivex (1.58 vs. 1.53), so polycarbonate lenses are about 10 percent thinner than Trivex lenses, but as you see in the video, the difference may not even be noticeable. All in all, though, high index plastic is a better all-around lens material that Trivex. If Poly is thinner how is Trivex better/thinner? Trivex has a refractive index of 1.53. Is there a known issue with g15/trivex? Polycarbonate Abbe value = 30. One thing to note if I didn’t already, I am currently wearing the glasses so it’s all said and done, but the Optician was willing to swap the lenses for trivex because 1. 1.67 vs 1.74 High Index Lenses – What You Need to Know. The high-index 1.60 lenses are recommended for prescriptions between -3.00 to -5.50. Thickness: Polycarbonate lenses have a higher index of refraction than Trivex lenses, but not by much (1.58 vs 1.53). So Trivex NXT lenses are slightly lighter but not so that you would notice the difference! They’re already scratched somehow and 2. High-index plastics allow for thinner lenses. Trivex vs. Polycarbonate: A Quick Side-By-Side Comparison. We’d love to hear from you. Press question mark to learn the rest of the keyboard shortcuts. Units called diopters are used to measure the lens power necessary to correct refractive errors. It has better optics than poly and doesn’t scratch as easily, while still being impact and shatter resistant. Lens Index is also related to the thickness of the lens. Thank you for the response though! Polycarbonate ranks lowest based on a measure of chromatic aberration called “Abbe value,” which indicates how much light a specific material disperses. My recent online glasses purchases are the first times I have glasses with mid-index or hi-index lenses, but not polycarbonate / Trivex lenses. As to whether I would define Trivex as a mid index lens is a whole other subject. Thickness: Polycarbonate lenses have a higher index of refraction than Trivex lenses, but not by much (1.58 vs 1.53). Sorry didn’t get a notification for your response. Top answers from doctors based on your search: Disclaimer. Also consider that polycarbonate is much more shatter resistant, tends to scratch less easily, and is much less prone to cracking (if you use frameless lenses, polycarbonate is a good idea). Dr. Richard Bensinger answered. The lower numbers are classified as mid-index lenses. Learn to make the right choice! A disadvantage is that high-index plastic lenses suffer from a much higher level of chromatic aberrations, which can be seen from their lower Abbe value. These lenses offer around ten 10 times more resistance to impact damage than traditional lenses and their properties, together with complete 100% … And the last pair was with clear CR-39. Rx-Safety.com is a family-owned and – run optical lab and online store. Weight: Despite having less material due to the thinner lens, polycarbonate sunglasses are heavier than their Trivex counterparts. Your email address will not be published. It covers SPHs of -20.00/+10.00 or lower and CYLs of +/- 6.00 or lower. Next comes the 1.67 high-index polymer single-vision lens. So, too often, you choose an option that’s not actually ideal for your needs and wants. It's more of a choice between 1.6's thinness, and Trivex's price. Compared with traditional lenses, highly index lenses can bend the light more efficiently, so they can be thinner while maintaining the same correction power. Lenses with aspheric curves also justify higher prices. The difference between your glasses' lens index can make a huge impact. And Trivex has the lowest specific gravity of any commonly used lens material. High index lenses can be up to 50% thinner than regular glass or plastic lenses, and they’re usually much lighter, too. high-index and anti-reflective coated lenses. Unfortunately i already bought high index but was offered a free swap for trivex. Everything that I'm finding is that Trivex is at a 1.53 compared to 1.58 Poly. To win that numbers game, you’ve got to master a few key optical concepts and facts. Trivex lenses are very strong. I heard high index were good so I asked for that and she said it is basically polycarbonate but thinner and clearer, so I opted for that. The Lens Index number (1.50, 1.57, 1.53, 1.59, 1.61, 1.67, or 1.74) refers to the degree of refraction the lens provides. When I got new glasses 5 years ago, I specifically asked for Trivex because it's supposed to have low chromatic aberration. High-index plastics allow for thinner lenses. The high-index 1.67 (which I see during my research that Costco offers) is recommended for prescriptions -6.00 to -7.50. But my current frames are much thinner (Poly) compared to the new ones. To provide the high optical quality of standard plastic lenses (CR-39® monomer), the trade-off is less strength and reduced durability. This means the lenses are thinner and lighter. Just glass (heavy) and CR-39. Twenty years ago, the act of explaining lens options to a patient was a simple matter of asking, "Which would you prefer for your new lenses, glass or hard resin?" The liquid polycarbonate is then rapidly injected into lens moulds, compressed under high pressure and cooled to form a finished lens product in a matter of minutes. The lenses may not be lighter, however, due to the increase in density vs. mid- and normal index materials. High index plastic’s index ranges from. It is a very durable and well-rounded lens material, but does it stack up to high index plastic? Trivex is 16% lighter than CR-39, 25% lighter than 1.66, and 8% lighter than polycarbonate! They're lightweight and stylish, but are mostly reserved for those with higher vision correction needs. While Trivex has a slightly lower refractive index (1.53 compared to 1.58), it's specific gravity, 1.11g/cm3, makes it the lightest of any … Once you get close to -5.00 diopters, moving the index higher to a 1.61 is a good idea, if it fits your budget. On the other hand, its optical quality is inferior to CR-39. In 2001 a rival lens material called Trivex was developed. Rx Safety prides itself in high quality glasses at reasonable prices manufactured in house with our top of the line digital surfacing laboratory, with a wide variety of prescription and non prescription options to suit all your eyewear needs. 1.50 Blokz Standard Index (Additional $16.95) 1.53 Blokz Trivex Impact Resistant (Additional $39.95) 1.61 Blokz High-Index (Additional $29.95) 1.67 Blokz High-Index (Additional $49.95) Another advantage of polycarbonate and Trivex lenses is that they are both thinner, for any given prescription than standard (non-high index) index. High Index vs. Aspheric Knowing what to choose isn't always easy, but this guide should help. The lenses may not be lighter, however, due to the increase in density vs. mid- and normal index materials. It also depends on your frame selection. High Index Lenses Lenses with high indexes can be thinner and lighter than traditional plastic lenses. It’s been just over a decade since PPG introduced Trivex, the lightweight, durable mid-index lens material that PPG positioned as an upgrade from its industry-standard CR-39 monomer. Trivex is 16% lighter than CR-39, 25% lighter than 1.66, and 8% lighter than polycarbonate! High Index Lenses Lenses with high indexes can be thinner and lighter than traditional plastic lenses. Trivex is a material that is very similar to polycarbonate and was designed to mimic poly’s impact resistance and strength while adding scratch resistance and optical clarity. On the other hand, its optical quality is inferior to CR-39. Trivex is an improvement over Polycarbonate. How would you compare it to lenses used by Hoya or Zeiss? Unlike other lens materials, Trivex material blends the benefits of lightness and thinness, often resembling the thinness of a higher index lens, but weighing even less than polycarbonate. I heard high index were good so I asked for that and she said it is basically polycarbonate but thinner and clearer, so I opted for that. This indicate the lenses of this material for rimless glasses, if what … I recently got new eyeglasses and prescription sunglasses at a new (to me) optometrist. Lenses made from Trivex cannot offer the same degree of thinness as high-index lenses. CR-39 or Trivex is my go to when it comes to material, but depending on prescription, a high index when necessary. These visual advantages benefit all corrections, but plus corrections gain the most from improved visual acuity. That means that Trivex NXT lenses are about 10 percent thinner and a bit lighter than polycarbonate lenses. Trivex lenses: the low-down. A pioneer in the development and production of ophthalmic lenses, Essilor employs more than 9,000 people throughout North America. “How come you didn’t recommend trivex when I asked for the best available?” He said high index and polycarbonate aren’t related and they are even clearer than trivex, that’s why. The only thing that changed was the astigmatism. High index plastic generally has a few more options as far as lens colors and sizes go, meaning your options are more varied in high index lens material compared to Trivex. Although Trivex has gained many supporters, some eyecare practitioners remain hesitant to use it. With your script, high index is absolute overkill. Both 1.60 and trivex are good choice for drill-jobs. High-index lenses measure slightly better than polycarbonate. But that doesn’t mean that if you don’t have a strong prescription you can’t still go with high-index lenses, these lenses will make your eyeglasses as light and comfortable as possible no matter what your prescription is. High index plastic’s key feature is its thinness, especially in higher prescriptions. Trivex is more impact resistant than high index plastic, making it a much better choice for safety glasses or other types of glasses that need to meet certain impact requirements. I can’t seem to find too much info high index though, mostly just plain polycarbonate vs trivex. Buy High Index Lenses. Featuring an index of 1.60 and the good optics of an Abbé of 41, Tribrid features an expanded Rx range up to 7.00 diopters. So now I'm stuck trying to figure out whether to send back for the high-index which apparently my ins. With your script, I would probably recommend poly or trivex (though honestly depending on your frame choice you could probably get away just as well with CR39 plastic). The higher the number, the thinner and lighter the lens. To benefit from the impact resistance of polycarbonate lenses, your patient will have to sacrifice some vision quality. He did say if I wanted to switch to trivex I can.. what do you all think? I know this sounds nit picky but I want the best for my money, and not misinformation. Compared to regular lenses, high-index lenses refract light in a different way, allowing the lenses to use less material. This means the index of refraction would need to be greater than that of polycarbonate and Trivex (>1.60). High index plastic has similar scratch resistance to Trivex. High costs. Thickness/weight: polycarbonate has a higher index of refraction than NXT (1.58 vs. 1.53) and a lower specific gravity than polycarbonate. Optical clarity at the central vision point. Glasses become a burden if you are … 51 years experience Ophthalmology. I tried doing research but couldn’t find good stuff. Polycarbonate makes sense as an outdoor eyewear material. Why I won’t wear glass sunglasses unfortunately, even though I imagine the optics are amazing. She also tried to BS me and blame my Rx on going up which isn't true. Trivex lenses: the low-down. Compared with traditional lenses, highly index lenses can bend the light more efficiently, so they can be thinner while maintaining the same correction power. Trivex® lenses are impact resistant and more lightweight than standard lenses. Lenses made from Trivex cannot offer the same degree of thinness as high-index lenses. Regular Lenses vs. High-Index Lenses . Trivex is generally a similar cost to high index plastic. High index plastic’s index ranges from 1.67 to 1.74, making it considerably thinner and more lightweight than Trivex, especially in higher prescriptions. Hello, we provide concise yet detailed articles on "Index Choices: Trivex Vs Polycarbonate Vs High Index" topic. My prescription is not strong either, most astigmatism fix: RT: sphere -0.50, Cylinder -2.25, axis 175 LT: sphere -1.00, cylinder -2.00, axis 178. Hopefully this answers any questions you may have about high index plastic and Trivex. Sunglass Underground presents: How to Choose the Right Lens Material for Your Sunglasses. Trivex has a low index of 1.53, similar to standard plastic. The resulting number (1.5, 1.6, 1.67, 1.74) is referred to as the “index.”. Especially because I ride motorcycles, gone hike often, etc. In 2001 a rival lens material called Trivex was developed. This means high-index lenses bend light at steeper angles than standard-index, hard resin lenses. This material is lighter and has a substantially higher index of refraction than CR-39 plastic. 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