Glass lenses, plastic lenses, or laminated glass lenses can be made impact resistant … A number of plastic lens materials are thinner and lighter than CR-39 plastic, which offers even more comfort than the standard CR-30 plastic lenses. How? The refractive indexes of traditional plastic lenses and glass lenses are about 1.5 and 1.52 respectively. It is lighter and more scratch resistant and has high-impact resistance like Polycarbonate. Hi, I'm Endre with my brother Arpi. So I suggest you to use the same polycarbonate you had before, that offers the most protection for your lenses. Two scratch redos per year One prescription redo within 6 months WHEN ORDERING We need your prescription information to make your new glasses, including the “PD” for Pupillary Distance. When a worker falls, their body harness, lifeline, self-retracting lanyard, and anchor are all subjected to a high impact. Join in and write your own page! High-impact resistant polycarbonate lenses are ideal for: Children; Athletes; People with mild to moderate prescriptions; Rimless and semi-rimless frames; Our polycarbonate lenses include polished edges as well as scratch-resistant and UV-protection coatings. Polycarbonate lenses have superior impact resistance and are lighter than regular plastic lenses. (Ames, Iowa). Most high index scratch-resistant lenses are 50 percent lighter than CR-39 plastic lenses. Simply click here to return to FAQ. High index lenses are not naturally impact resistant. Impact-resistant lenses reduce the number of eye injuries from eyeglasses and sunglasses. Learn more about how Polycarbonate lenses or impact-resistant lenses are up to 10 times more impact resistant than regular plastic lenses. Mid-index lenses, such as 1.54, 1.56, and 1.57, are thinner than glass, and nearly as strong as CR-39. If you are interested in impact resistant high index lenses, here are some useful things to know: If you are most concerned with keeping your eyes safe from impact, you should definitely purchase a pair of prescription glasses with polycarbonate lenses. In terms of balancing price … High Index Lenses Of course, high index lenses are in a separate category precisely because their refractive index is far above the rest. An eye professional can advise on what type of high index lens material is best for your prescription and budget. They also feature natural 100 percent UV protection. How thick would plastic lenses be on a round size 48 frame? Thicker lenses are more affordable, but can only accommodate lower vision correction needs. MR™ Series offers a variety of products to provide the best solution for optical lens users. Even if you have a weaker prescription but you just want your glasses to be as light as possible, high-index lenses would work for you as well. Deciding which you should get depends on your prescription and your lifestyle. However, labs would generally surface this material down to 1.5 mm and then perhaps add an AR coating to it. And most of all, it gets thick quickl… The difference between your glasses' lens index can make a huge impact. Lenses made from Trivex are extremely resistant to common problems like being dropped or scratched. I have. Do high-index lenses cause distortion? It does not contain the impact resistant qualities of polycarbonate. Some stronger prescriptions require even high index lenses to be thick enough that they would pass ANSI’s standard impact resistance test, though it is impossible to find a pair of high index prescription glasses that pass ANSI’s “high impact resistance” test. Essilor’s polycarbonate lenses are 20% thinner, 30% lighter, and 12x more impact resistant than standard plastic lenses. High Index Lenses . The lenses are a high-index plastic material. They are considered a high index plastic. Unless these material can all withstand the force of the impact, … Compared with polycarbonate lenses, Trivex® is a premium material that provides crisper vision and is 10% lighter. Polycarbonated Lenses. And remember – better safe than sorry! Trivex is an improvement over Polycarbonate. Like Perfect-Eyeglasses-Guide.com on Facebook. Excellent optical materials with high refractive index, high Abbe number, low specific gravity and high impact resistance are provided by polymerizing monomers of MR™ Series. If your lenses are thick enough to have standard (safety) impact resistance, you may be able to have your optical provider supply you with a Z87 stamp, certifying them as safety glasses (as long as the frame they’re in is also safety). Trivex® lenses are impact resistant and more lightweight than standard lenses. As well as their similar weight and thickness, both lenses provide comparable impact resistance. It is widely known that polycarbonate lenses are much lighter and thinner than regular plastics. A comparison between polycarbonate and high-index lenses. Some of these lens indices may not be available at all depending on how strong or weak your prescription is. Rx-Safety.com is a family-owned and – run optical lab and online store. Join in and write your own page! How to Choose the Right Glasses Lens Differences among different lens indexes can generate great impacts. They can sharpen your sight even further if you apply an anti-glare coati… They’re also ideal for strong prescriptions since they do not add thickness when correcting vision, minimizing any distortion. © RX Safety - Developed by ISEA Media & Cosmick Technologies. Any lens material with a refractive index higher than these numbers are considered a highly index lens material. The 1.53 mid-index Trivex lens is a polymer lens that is the most impact-resistant lens available. Polycarbonate lenses are made of a type of plastic that is more impact-resistant than standard plastic lenses. Copyright © 2020 Perfect-Eyeglasses-Guide.Com. These lenses are 8% to 25% lighter and thinner than CR-39 (normal plastic), depending on the prescription. All rights reserved. Save my name, email, and website in this browser for the next time I comment. Of course, this means that both require a scratch resistant coating, but with this coating, … All high-index lenses sold on Eyeconic.com are scratch and impact resistant. Are high-index lenses worth the extra cost? Impact resistance is an important consideration for fall protection equipment. They are also very resistant to unusual problems, like several chemicals. We Unfortunately though it is rather heavy, and also can shatter relatively easily. Got a new pair of glasses with bifocals and noticed that the left bifocal is slightly tilted and at a different height than the right. Your email address will not be published. If you have the knowledge or experience that others would want, you can do the same and create a website from scratch about your hobby, using the right tools. They have a refractive index of 1.586 and due to its impact resistant quality are used primarily for children’s eyewear, safety glasses, and sports eyewear. High index lenses are more scratch-resistant than polycarbonate, so if you’re looking for lens longevity as opposed to impact resistance, high index plastic is still probably the best choice. Acetone is a common chemical in nail polish removers and some other solvents that may be around your house. The combination of a thinner center and a brittle AR coating might drop the … This website is created for a purpose, we want to help as many people as possible, to make an informed choice when shopping for glasses. They can resist acetone, which few plastics can resist, including polycarbonate. 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