Polycarbonate and Trivex lenses are special high index lenses that offer superior impact resistance. Polycarbonate lenses have an ABBE value of 30, and standard CR-39 lenses have an ABBE value of 59.3, almost 2x as much as polycarbonate lenses. These lenses are fashionable, light weight, and thin. Polycarbonate Lenses In 1953, two scientists working independently on opposite sides of the world developed polycarbonate within 1 week of each other. That means they scratch more easily. The major problem with polycarbonate is that the production process is universal. Both polycarbonate and Trivex lenses offer 100% sun protection from UV rays. Polycarbonate lens didn’t truly gain traction among the optical industry until more recently due to various problems with the material clarity and manufacturing. Call: 646-480-6832 to schedule your annual eye exam. What are Bifocals? Polishing Polycarbonate: The Complete Guide Polycarbonate as a material is known for its durability and excellent resistance to impact. Polarized lenses are also made of plastic, but they also contain a special filter that prevents "intense reflected light, reducing glare," according to All About Vision. Wear safety gear and choose an appropriate cutting tool ii. Since you see differently out of polycarbonate lenses, you may have some adjust-ing to do every time you switch from glasses with polycarbonates lenses to glasses made with glass or plastic lenses. To solve this problem, modern polycarbonate lenses are generally covered with a scratch-resistant coating that makes them almost as hard as glass. Problems with transmission and reflection can be minimized by adding an anti-reflective coating. They began to doubt how safe it is to wear sunglasses with this material. Polycarbonate lenses have a moderate price and are thinner, lighter, ... One of the few progressive lens disadvantages it that there are occasionally problems with HD progressive lenses when walking up and downstairs. 3. Problems with progressive lenses due to two different astigmatisms for near and far vision. Because of the many benefits polycarbonate glasses offer, many people choose to use these lenses in replacement of their regular lenses. Standard plastic lenses are around 1.48, so polycarbonate is a good, inexpensive alternative to standard plastic lenses if you do not have a very high prescription. En portant des lunettes de sport de prescription avec des lentilles en polycarbonate résistant aux chocs, vous pouvez réduire considérablement le risque de subir une abrasion cornéenne douloureuse ou d'autres blessures aux yeux pendant les sports actifs. Learn More. UV radiation can be removed by walking out of the sun. After discovering this I was immediately convinced that this was my problem, and I was very angry with Lenscrafters for pushing the Polycarbonate lenses on me, and making plastic lenses seeming like they were an inferior product. “High” minus lenses for nearsightedness can cause some cosmetic problems and visual distortion. UV Protection. While they’re not the thinnest kind of lens out there, they still retain their position as the swiss-army-knife of eyewear lenses. Problems with lens blur often can be reduced by requesting an aspheric lens design, in which the lens curvature gradually flattens toward the perimeter of the lens. Polycarbonate lenses were the first plastic high index lenses. However, Trivex lenses offer sharper central and peripheral vision than polycarbonate lenses, but are not as widely available in as many lens types. But there is no such thing as high index polycarbonate lenses… Your type of vision problem will determine the shape of your lens. 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