How would you compare it to lenses used by Hoya or Zeiss? From there, if you have a prescription over -6.00 diopters, a 1.67 high index lens is a … And that can mean fewer patient complaints of heavy eyewear sliding off their nose. Trivex has a refractive index of 1.53. … The difference between your glasses' lens index can make a huge impact. 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. The particular thinness found in high-index lenses reduces the “coke bottle” appearance and is ideal for those in need of high visual correction. Trivex is a material developed for military purposes. Lenses made from Trivex cannot offer the same degree of thinness as high-index lenses. 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. Trivex has a low index of 1.53, similar to standard plastic. 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). Thickness: Polycarbonate lenses have a higher index of refraction than Trivex lenses, but not by much (1.58 vs 1.53). Additionally, they are lighter than both of those lenses despite only having a marginally larger index than polycarbonate. Trivex is an improvement over Polycarbonate. Also, isn’t cr39 weaker when it comes to scratches? 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). Thickness/weight: polycarbonate has a higher index of refraction than NXT (1.58 vs. 1.53) and a lower specific gravity than polycarbonate. The information here is sourced well and enriched with great visual photo and video illustrations. With your script, high index is absolute overkill. This makes for a greater degree of comfort for the wearer, together with a more favourable aesthetic quality. It beats out all other lens materials for thinness, lightness, and aesthetics. If Poly is thinner how is Trivex better/thinner? Is this wrong? When I got new glasses 5 years ago, I specifically asked for Trivex because it's supposed to have low chromatic aberration. Just glass (heavy) and CR-39. Thank you very much. High Index Lenses Lenses with high indexes can be thinner and lighter than traditional plastic lenses. She also tried to BS me and blame my Rx on going up which isn't true. Optical clarity at the central vision point. It covers SPHs of -20.00/+10.00 or lower and CYLs of +/- 6.00 or lower. 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. Weight. won't discount. Trivex vs high index. High-index lenses measure slightly better than polycarbonate. Other high-index materials are classified by numbers. Save my name, email, and website in this browser for the next time I comment. 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. As with most purchases in life..you get what you pay for and not all lenses are the same . It also depends on your frame selection. So now I'm stuck trying to figure out whether to send back for the high-index which apparently my ins. Glasses tend to get quite thick at high correction, especially some low index (1.50) lenses. Trivex® lenses are impact resistant and more lightweight than standard lenses. Another important property is that polycarbonate naturally blocks 100% UV light. High-index plastics allow for thinner lenses. High index plastic has similar scratch resistance to 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. All in all, though, high index plastic is a better all-around lens material that Trivex. On the other hand, its optical quality is inferior to CR-39. Trivex material provides high impact resistance. While most prescriptions are compatible with more than one specific index, it's up to you to decide which one fits your personal needs! Thank you for the response though! High Index vs. Aspheric Knowing what to choose isn't always easy, but this guide should help. The real winners are materials such as Trivex, CR-39 and Crown Glass. High index lenses are classified by numbers that represent their refractive index and range from 1.64 to 1.74. 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 … Trivex is 16% lighter than CR-39, 25% lighter than 1.66, and 8% lighter than polycarbonate! This means the index of refraction would need to be greater than that of polycarbonate and Trivex (>1.60). Regular Lenses vs. High-Index Lenses . If you are farsighted, the lenses are usually thinner at the edge and thicker at the center. Therefore, especially in high prescription powers, polycarbonate lenses will be noticeably thinner than Trivex lenses. 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. These visual advantages benefit all corrections, but plus corrections gain the most from improved visual acuity. 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. 1.50 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 important property is that polycarbonate naturally blocks 100% UV light. 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. Ps. Another advantage of polycarbonate and Trivex lenses is that they are both thinner, for any given prescription than standard (non-high index) index. 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. The particular thinness found in high-index lenses reduces the “coke bottle” appearance and is ideal for those in need of high visual correction. Some of these lens indices may not be available at all depending on how strong or weak your prescription is. Lenses with aspheric curves also justify higher prices. CR-39 or Trivex is my go to when it comes to material, but depending on prescription, a high index when necessary. This means the lenses are thinner and lighter. Given the Lies I don't know whether that's true or not. I started wearing glasses with glass lenses. Your email address will not be published. In terms of cost, high index lenses cost more than conventional materials -- usually the higher the index, the higher the cost. 51 years experience Ophthalmology. Polycarbonate vs. Trivex Lenses: A Quick Comparison. 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. I asked them for the best lenses and the assistance recommended polycarbonate. The higher the number, the more light is slowed down or bent. Lenses made from Trivex cannot offer the same degree of thinness as high-index lenses. Both 1.60 and trivex are good choice for drill-jobs. Trivex: How Does It Compare to High Index Plastic? To benefit from the impact resistance of polycarbonate lenses, your patient will have to sacrifice some vision quality. 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. But my current frames are much thinner (Poly) compared to the new ones. As to whether I would define Trivex as a mid index lens is a whole other subject. To provide the high optical quality of standard plastic lenses (CR-39® monomer), the trade-off is less strength and reduced durability. Trivex vs. Polycarbonate: A Quick Side-By-Side Comparison. Not for me. Compared with traditional lenses, highly index lenses can bend the light more efficiently, so they can be thinner while maintaining the same correction power. We’d love to hear from you. It is a very durable and well-rounded lens material, but does it stack up to high index plastic? Lens Index is also related to the thickness of the lens. Mid-index lenses, such as 1.54, 1.56, and 1.57, are thinner than glass, and nearly as strong as CR-39. Dr. Richard Bensinger answered. Standard plastic lenses have an index of refraction of 1.50, and glass lenses have an index of refraction of 1.52. Trivex material provides high impact resistance. Hello, Trivex has the lowest specific gravity of any commonly used lens material. Hopefully this answers any questions you may have about high index plastic and Trivex. They recommended high index over trivex for me. By Joseph L. Bruneni. Impact resistance and external factors. Let's compare and contrast the two based on their primary qualities. Trivex is usually the lightest weight lens material. Units called diopters are used to measure the lens power necessary to correct refractive errors. I tried doing research but couldn’t find good stuff. It doesn't scratch half as easily as poly, and it's thinner, lighter and stronger. Weight: Despite having less material due to the thinner lens, polycarbonate sunglasses are heavier than their Trivex counterparts. Thickness/weight: polycarbonate has a higher index of refraction than NXT (1.58 vs. 1.53) and a lower specific gravity than polycarbonate. 1.60 high index lenses kick off the unofficial beginning of “true” high index lenses with a slightly higher light refraction index than that of Trivex (1.53) and polycarbonate (1.59). 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. Essilor manufactures optical lenses under the Varilux®, Crizal®, Xperio®, DEFINITY®, Thin&Lite® and other Essilor brand names. 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. acetone) while polycarbonate eyeglass lens is not. Weight. My Rx is -3.50 with minor astigmatism (I still wear regular contacts). Plus, at least in my office, it's cheaper than hi index. Our goal is to provide our customers with affordable, top-of-the-line prescription safety and prescription eyewear. These lenses are perfect for anyone with stronger prescriptions, but not only limited to … If you’re shopping for safety glasses or prescription glasses with a low prescription, Trivex is worth considering. They can be made with CR-39, polycarbonate, or high-index lenses. Shopping for eyeglasses can be complex. Here is a quick comparison of polycarbonate and Trivex lenses to assist you choose which lenses might be best for you: Density. 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. Next comes the 1.67 high-index polymer single-vision lens. Thickness: Polycarbonate lenses have a higher index of refraction than Trivex lenses, but not by much (1.58 vs 1.53). High costs. This translates to a lens that is around 10% thinner. 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. (At least to Poly). Trivex has a refractive index of 1.53. Thank you for that info, it helps. This makes Trivex the lightest lens material. Trivex has a lower specific gravity than polycarbonate, making Trivex lenses about 10 percent lighter than polycarbonate lenses. Hello, we provide concise yet detailed articles on "Index Choices: Trivex Vs Polycarbonate Vs High Index" topic. The higher the index, the thinner the lens … 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. You seem knowledgeable on lenses. The information here is sourced well and enriched with great visual photo and video illustrations. In 2001 a rival lens material called Trivex was developed. High-index plastics allow for thinner lenses. Learn the pros and cons of Trivex lenses. Although Trivex has gained many supporters, some eyecare practitioners remain hesitant to use it. I asked the Dr this time, instead of the assistant. Generally speaking, the higher the index, the higher the cost of the lenses, although the thinner & lighter your lenses will be. If you are interested in getting the thinnest, lightest lenses possible, there is no question that high index plastic is the best choice for you. On the other hand, its optical quality is inferior to CR-39. Despite its benefits, it can be expensive and hard to find. Trivex lenses are very strong. Glasses become a burden if you are … Trivex is 16% lighter than CR-39, 25% lighter than 1.66, and 8% lighter than polycarbonate! Either has advantages and disadvantages. Sorry didn’t get a notification for your response. If for no other reason than it being really really tough. The extra reflections are usually quite bothersome for the wearer especially at night and while using a computer monitor. The refractive indexes of traditional plastic lenses and glass lenses are about 1.5 and 1.52 respectively. On the other hand, polycarbonate lenses have a higher index of refraction than Trivex lenses (1.58 vs. 1.53). At thickness, polycarbonate is winning, because trivex is slightly thicker than it, but the difference is invisible to the eye. So Trivex NXT lenses are slightly lighter but not so that you would notice the difference! This translates to a lens that is around 10% thinner. The higher the prescription, the higher index should be lens choices. 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. 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. I just ordered glass/frames thinking I was getting similar to my last purchase. The higher the number, the thinner and lighter the lens. High index plastic has similar scratch resistance to Trivex. I would say anything under a -5.00 to a +3.00, Your email address will not be published. This means how much the light that enters the lens is refracted (bent) as it passes through the lens. 2. Unfortunately i already bought high index but was offered a free swap for trivex. Polycarbonate makes sense as an outdoor eyewear material. With a specific gravity of 1.21, Tribrid is the lightest of all high-index lenses. Learn to make the right choice! Optician here, not doctor, but I personally prefer trivex. Required fields are marked *. The lady at the doc told me she gave me Trivex and that Trivex is a 1.60 (which is a lie!) so shatter resistance is important. high-index and anti-reflective coated lenses. I never had glasses with polycarbonate or Trivex lenses. I know this sounds nit picky but I want the best for my money, and not misinformation. It is lighter and more scratch resistant and has high-impact resistance like Polycarbonate. So, too often, you choose an option that’s not actually ideal for your needs and wants. They're lightweight and stylish, but are mostly reserved for those with higher vision correction needs. Between poly and trivex, trivex is definitely the better material. Like polycarbonate, lenses made of Trivex are thin, lightweight but are even more impact-resistant than polycarbonate. To win that numbers game, you’ve got to master a few key optical concepts and facts. The lower numbers are classified as mid-index lenses. Trivex and Mid-Index are not the same, because 1.56 is considered a mid-index lens. This means the lenses are thinner and lighter. When aspheric curvatures are used on lenses, even more thickness and weight reduction can be achieved. 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. It's more of a choice between 1.6's thinness, and Trivex's price. 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. Then I even had at one time photogrey with glass lenses. The high-index 1.67 (which I see during my research that Costco offers) is recommended for prescriptions -6.00 to -7.50. When you find the article helpful, feel free to share it with your friends or colleagues. The lenses may not be lighter, however, due to the increase in density vs. mid- and normal index materials. 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