The resulting number (1.5, 1.6, 1.67, 1.74) is referred to as the “index.”. 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 . Trivex is a material developed for military purposes. Trivex lenses ($200 for single vision, $400 for progressives) are more scratch-resistant than either CR-39 or polycarbonate lenses. Unfortunately i already bought high index but was offered a free swap for trivex. 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. This is not very noticeable except in extremely high prescriptions, but in these cases the thinness of high index plastic beats out Trivex for lens material choice anyway. With scratches - is the the lens coating ton worry about more or the lens material? High index lenses are thinner, more powerful lenses. To win that numbers game, you’ve got to master a few key optical concepts and facts. Thank you for that info, it helps. Buy High Index Lenses. Plus, at least in my office, it's cheaper than hi index. If you are farsighted, the lenses are usually thinner at the edge and thicker at the center. Is this wrong? Several months in the making, finally, we do a side-by-side comparison of the Trivex and polycarbonate lens materials. Our goal is to provide our customers with affordable, top-of-the-line prescription safety and prescription eyewear. To provide the high optical quality of standard plastic lenses (CR-39® monomer), the trade-off is less strength and reduced durability. 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. Trivex is not too far behind, but in higher prescriptions there is no comparison. 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. High-index lenses measure slightly better than polycarbonate. Required fields are marked *. Next comes the 1.67 high-index polymer single-vision lens. How would you compare it to lenses used by Hoya or Zeiss? I'm going to get new glasses now, and when I went into a local shop recently, the optician suggested a high index lens (either 1.6 or 1.67) and said there was no reason to get Trivex, which cost 50% more. High index lenses are classified by numbers that represent their refractive index and range from 1.64 to 1.74. Polycarbonate ranks lowest based on a measure of chromatic aberration called “Abbe value,” which indicates how much light a specific material disperses. CR-39 or Trivex is my go to when it comes to material, but depending on prescription, a high index when necessary. 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). Standard plastic lenses have an index of refraction of 1.50, and glass lenses have an index of refraction of 1.52. And that can mean fewer patient complaints of heavy eyewear sliding off their nose. than ultra high index (1.66 and 1.74) materials. The high-index 1.60 lenses are recommended for prescriptions between -3.00 to -5.50. 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. It provides a thinner lens for stronger prescriptions than the 1.50 standard-index, 1.53 Trivex, 1.57 mid-index, 1.59 polycarbonate, and the 1.61 high-index lenses. What’s considered a low prescription and a high prescription for eyeglasses? With a specific gravity of 1.21, Tribrid is the lightest of all high-index lenses. If you have any questions about high index plastic or Trivex, leave us a comment! Trivex has a lower specific gravity than polycarbonate, making Trivex lenses about 10 percent lighter than polycarbonate lenses. This makes Trivex the lightest lens material. Additionally, they are lighter than both of those lenses despite only having a marginally larger index than polycarbonate. Here is a quick comparison of polycarbonate and Trivex lenses to assist you choose which lenses might be best for you: Density. A 36-year-old member asked: are polycarbonate lenses helpful? 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. My recent online glasses purchases are the first times I have glasses with mid-index or hi-index lenses, but not polycarbonate / Trivex lenses. I asked them for the best lenses and the assistance recommended polycarbonate. (At least to Poly). They're lightweight and stylish, but are mostly reserved for those with higher vision correction needs. A lens with a higher index of refraction tends to reflect light more than standard CR-39 plastic or glass lenses. 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). won't discount. Thanks so much for reading! Trivex material provides high impact resistance. They’re already scratched somehow and 2. Trivex has a refractive index of 1.53. © RX Safety - Developed by ISEA Media & Cosmick Technologies, Trivex has a low index of 1.53, similar to standard plastic. This means the lenses are thinner and lighter. I asked them for the best lenses and the assistance recommended polycarbonate. You seem knowledgeable on lenses. Compared with polycarbonate lenses, Trivex® is a premium material that provides crisper vision and is 10% lighter. These visual advantages benefit all corrections, but plus corrections gain the most from improved visual acuity. Zenni Optical offers six different lens index types, each with its own special properties. Eyezen+’s have been one of our most popular lenses because of the clarity, Smart Blue Filter, and getting everyone in digital technology is something that is going to set us above competitors when it comes to actual product. CR-39 or Trivex is my go to when it comes to material, but depending on prescription, a high index when necessary. In 2001 a rival lens material called Trivex was developed. This translates to a lens that is around 10% thinner. When I got new glasses 5 years ago, I specifically asked for Trivex because it's supposed to have low chromatic aberration. If your patient wants the advantages of thinner, high index lenses, they’ll need to accept heavier and less durable lenses. They recommended high index over trivex for me. Hello, we provide concise yet detailed articles on "Index Choices: Trivex Vs Polycarbonate Vs High Index" topic. Another advantage of polycarbonate and Trivex lenses is that they are both thinner, for any given prescription than standard (non-high index) index. Thank you very much. Trivex is 16% lighter than CR-39, 25% lighter than 1.66, and 8% lighter than polycarbonate! She also tried to BS me and blame my Rx on going up which isn't true. In high index 1.74 and 1.70, Trivex is generally a bit cheaper. This translates to a lens that is around 10% thinner. If you’re shopping for safety glasses or prescription glasses with a low prescription, Trivex is worth considering. A pioneer in the development and production of ophthalmic lenses, Essilor employs more than 9,000 people throughout North America. I asked the Dr this time, instead of the assistant. Trivex lenses: the low-down. It provides a thinner lens for stronger prescriptions than the 1.50 standard-index, 1.53 Trivex, 1.57 mid-index, 1.59 polycarbonate, and the 1.61 high-index lenses. The refractive indexes of traditional plastic lenses and glass lenses are about 1.5 and 1.52 respectively. It beats out all other lens materials for thinness, lightness, and aesthetics. Polycarbonate makes sense as an outdoor eyewear material. By Joseph L. Bruneni. It is lighter and more scratch resistant and has high-impact resistance like Polycarbonate. The glare from the lenses … 2. Then I even had at one time photogrey with glass lenses. Top answers from doctors based on your search: Disclaimer. 1.67 vs 1.74 High Index Lenses – What You Need to Know. Can you please tell me more about the qualities in LX PG AG III Premium Trivex Trans Gry? The higher the number, the more light is slowed down or bent. Polycarbonate vs. Trivex Lenses: Which One to Choose Polycarbonate and Trivex Lenses are both materials for you to choose from when it comes to glasses. Optician here, not doctor, but I personally prefer trivex. I started wearing glasses with glass lenses. With your script, high index is absolute overkill. Polycarbonate vs. Trivex Lenses: A Quick Comparison. It is a very durable and well-rounded lens material, but does it stack up to high index plastic? Save my name, email, and website in this browser for the next time I comment. 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). Understanding Index of Refraction Index of Refraction is the speed of light in a vacuum divided by the speed of light in a given material. Their strength and impact resistance makes them a great option for kids’, rimless frames, sports goggles and safety glasses, or anyone who is rough on their glasses. Weight: Despite having less material due to the thinner lens, polycarbonate sunglasses are heavier than their Trivex counterparts. So, too often, you choose an option that’s not actually ideal for your needs and wants. Lenses with aspheric curves also justify higher prices. Trivex is 16% lighter than CR-39, 25% lighter than 1.66, and 8% lighter than polycarbonate! Shopping for eyeglasses can be complex. And the last pair was with clear CR-39. Between poly and trivex, trivex is definitely the better material. This means the index of refraction would need to be greater than that of polycarbonate and Trivex (>1.60). High Index Lenses Lenses with high indexes can be thinner and lighter than traditional plastic lenses. High-index lenses have an index of refraction that starts at around 1.61 and can go as high as 1.74. The extra reflections are usually quite bothersome for the wearer especially at night and while using a computer monitor. With so many lens materials and lens treatment combinations available, knowing when to recommend one high-index lens versus another can seem like a numbers game. 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 vs polycarbonate. … Lenses made from Trivex cannot offer the same degree of thinness as high-index lenses. and better than Poly. Trivex lenses: the low-down. The higher the number, the thinner and lighter the lens. Because of their superior tensile strength, Trivex lenses are less likely to crack at this connecting point than lenses made of polycarbonate or other lens materials. When you find the article helpful, feel free to share it with your friends or colleagues. Meanwhile, shatter resistance is also in favor of trivex. 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. Thickness: Polycarbonate lenses have a higher index of refraction than Trivex lenses, but not by much (1.58 vs 1.53). Thank you for the response though! Trivex is an improvement over Polycarbonate. The lower numbers are classified as mid-index lenses. They can be made with CR-39, polycarbonate, or high-index lenses. Given the Lies I don't know whether that's true or not. Your email address will not be published. Weight. I would say anything under a -5.00 to a +3.00, Your email address will not be published. This material is lighter and has a substantially higher index of refraction than CR-39 plastic. It covers SPHs of -20.00/+10.00 or lower and CYLs of +/- 6.00 or lower. 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. 51 years experience Ophthalmology. Trivex lenses are very strong. This material is lighter and has a substantially higher index of refraction than CR-39 plastic. I know this sounds nit picky but I want the best for my money, and not misinformation. High index plastic’s index ranges from. My Rx is -3.50 with minor astigmatism (I still wear regular contacts). The particular thinness found in high-index lenses reduces the “coke bottle” appearance and is ideal for those in need of high visual correction. 2. Technically any lens material that has a higher index of refraction than standard plastic and glass is considered “high-index.” RELATED: Best Anti-Fog For Your Prescription Lenses It has better optics than poly and doesn’t scratch as easily, while still being impact and shatter resistant. 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. Learn the pros and cons of Trivex lenses. From there, if you have a prescription over -6.00 diopters, a 1.67 high index lens is a … Essilor manufactures optical lenses under the Varilux®, Crizal®, Xperio®, DEFINITY®, Thin&Lite® and other Essilor brand names. Regular Lenses vs. High-Index Lenses . Impact resistance and external factors. The higher the index, the thinner the lens … This makes for a greater degree of comfort for the wearer, together with a more favourable aesthetic quality. Another important property is that polycarbonate naturally blocks 100% UV light. 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) Trivex is generally a similar cost to high index plastic. Thin Trivex material enables eyeglasses that are the perfect balance of performance and comfort all within a thin lens for most prescriptions. Trivex is 16% lighter than CR-39, 25% lighter than 1.66, and 8% lighter than polycarbonate! 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. Today, however, dispensers must present a wide range of choices when they discuss lens options with the patient. Units called diopters are used to measure the lens power necessary to correct refractive errors. Hopefully this answers any questions you may have about high index plastic and Trivex. These lenses are perfect for anyone with stronger prescriptions, but not only limited to … Although Trivex has gained many supporters, some eyecare practitioners remain hesitant to use it. It's more of a choice between 1.6's thinness, and Trivex's price. Polycarbonate Abbe value = 30. Trivex is usually the lightest weight lens material. High index plastic’s key feature is its thinness, especially in higher prescriptions. Either has advantages and disadvantages. Also, isn’t cr39 weaker when it comes to scratches? While most prescriptions are compatible with more than one specific index, it's up to you to decide which one fits your personal needs! These lenses offer around ten 10 times more resistance to impact damage than traditional lenses and their properties, together with complete 100% … The information here is sourced well and enriched with great visual photo and video illustrations. Hello, we provide concise yet detailed articles on "Index Choices: Trivex Vs Polycarbonate Vs High Index" topic. All in all, though, high index plastic is a better all-around lens material that Trivex. 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. Trivex: How Does It Compare to High Index Plastic? Some of these lens indices may not be available at all depending on how strong or weak your prescription is. The lenses may not be lighter, however, due to the increase in density vs. mid- and normal index materials. High index plastics do offer good ultraviolet inhibition (below 380-400 nanometers) properties as well as shatter resistance. Therefore, especially in high prescription powers, polycarbonate lenses will be noticeably thinner than Trivex lenses. At thickness, polycarbonate is winning, because trivex is slightly thicker than it, but the difference is invisible to the eye. The only thing that changed was the astigmatism. Is there a known issue with g15/trivex? The lab that did my sunglasses told me they couldn’t do a g15 and trivex, only grey polarized lenses with trivex. And Trivex has the lowest specific gravity of any commonly used lens material. This means high-index lenses bend light at steeper angles than standard-index, hard resin lenses. so shatter resistance is important. The higher the number, the more dense, or heavy, a lens material is. This makes Trivex the lightest lens material. Another important property is that polycarbonate naturally blocks 100% UV light. He did say if I wanted to switch to trivex I can.. what do you all think? 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. 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. When you find the article helpful, feel free to share it with your friends or colleagues. Polycarbonate makes sense as an outdoor eyewear material. Ps. This means the lenses are thinner and lighter. Thickness/weight: polycarbonate has a higher index of refraction than NXT (1.58 vs. 1.53) and a lower specific gravity than polycarbonate. Trivex material is one of the lightest lens materials on the planet. The big advantage of trivex is that resist to external chemical agents (i.e. Trivex material provides high impact resistance. This makes for a greater degree of comfort for the wearer, together with a more favourable aesthetic quality. That means that Trivex NXT lenses are about 10 percent thinner and a bit lighter than polycarbonate lenses. Trivex is 16% lighter than CR-39, 25% lighter than 1.66, and 8% lighter than polycarbonate! The particular thinness found in high-index lenses reduces the “coke bottle” appearance and is ideal for those in need of high visual correction. Wow sorry for the late reply, I didn’t get a notification. The information here is sourced well and enriched with great visual photo and video illustrations. Trivex lenses are very strong. The difference between your glasses' lens index can make a huge impact. Like polycarbonate, lenses made of Trivex are thin, lightweight but are even more impact-resistant than polycarbonate. Essilor manufactures optical lenses under the Varilux®, Crizal®, Xperio®, DEFINITY®, Thin&Lite® and other Essilor brand names. Press question mark to learn the rest of the keyboard shortcuts. As with most purchases in life..you get what you pay for and not all lenses are the same . Trivex and Mid-Index are not the same, because 1.56 is considered a mid-index lens. If Poly is thinner how is Trivex better/thinner? High index plastic has similar scratch resistance to Trivex. Therefore, high-index lenses need … I'm also in this boat. It also depends on your frame selection. Eyezen+’s have been one of our most popular lenses because of the clarity, Smart Blue Filter, and getting everyone in digital technology is something that is going to set us above competitors when it comes to actual product. The one who wins is you. High index plastic has similar scratch resistance to Trivex. 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. Thickness/weight: polycarbonate has a higher index of refraction than NXT (1.58 vs. 1.53) and a lower specific gravity than polycarbonate. Mid-index lenses, such as 1.54, 1.56, and 1.57, are thinner than glass, and nearly as strong as CR-39. Let's compare and contrast the two based on their primary qualities. Trivex outperforms many other lens material alternatives. If have a pair of glasses made with high index plastic and compare them to a pair made in the same prescription with Trivex, you’ll find that the high index plastic lenses are always thinner and, in higher prescriptions, more lightweight. Hello, The high-index 1.67 (which I see during my research that Costco offers) is recommended for prescriptions -6.00 to -7.50. 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. Other high-index materials are classified by numbers. Trivex® lenses are impact resistant and more lightweight than standard lenses. Best optics are my priority for sure. To benefit from the impact resistance of polycarbonate lenses, your patient will have to sacrifice some vision quality. 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. This means how much the light that enters the lens is refracted (bent) as it passes through the lens. Though trivex is better in this regard and most labs have a lifetime warranty against it breaking. On the other hand, its optical quality is inferior to CR-39. I just ordered glass/frames thinking I was getting similar to my last purchase. If for no other reason than it being really really tough. high-index and anti-reflective coated lenses. Optical clarity at the central vision point. 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 … But my current frames are much thinner (Poly) compared to the new ones. Not for me. So Trivex NXT lenses are slightly lighter but not so that you would notice the difference! high-index and anti-reflective coated lenses. Sunglass Underground presents: How to Choose the Right Lens Material for Your Sunglasses. High-index plastics allow for thinner lenses. High-index plastics allow for thinner lenses. 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. acetone) while polycarbonate eyeglass lens is not. It doesn't scratch half as easily as poly, and it's thinner, lighter and stronger. 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. Despite its benefits, it can be expensive and hard to find. 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. Compared with traditional lenses, highly index lenses can bend the light more efficiently, so they can be thinner while maintaining the same correction power. Especially because I ride motorcycles, gone hike often, etc. I never had glasses with polycarbonate or Trivex lenses. Lens Index is also related to the thickness of the lens. This mid-index value enables lenses made from Trivex material to be thinner, lighter and more comfortable. Their strength and impact resistance makes them a great option for kids’, rimless frames, sports goggles and safety glasses, or anyone who is rough on their glasses. Introduced in 2001 by PPG, as the only lens material other than polycarbonate to pass FDA Impact Resistance Test (@ 1mm CT), the High Velocity Impact Test, and meet ANSI Z87.1 '89 standards, Trivex has been slowly increasing in both popularity and availability. Trivex® lenses are impact resistant and more lightweight than standard lenses. 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. Everything that I'm finding is that Trivex is at a 1.53 compared to 1.58 Poly. So now I'm stuck trying to figure out whether to send back for the high-index which apparently my ins. Rx-Safety.com is a family-owned and – run optical lab and online store. Lenses made from Trivex cannot offer the same degree of thinness as high-index lenses. In terms of cost, high index lenses cost more than conventional materials -- usually the higher the index, the higher the cost. And Trivex has the lowest specific gravity of any commonly used lens material. Both 1.60 and trivex are good choice for drill-jobs. We’d love to hear from you.

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