He Solving Patient Needs Most people can’t perceive the color distortion at these levels. When we are talking about the index of lenses, we are referring to the lens material’s ability to bend light, this is referred to as the “index of refraction.”, This index of refraction is the ratio of the speed of light traveling through air, to the light traveling through the eyeglass lens material. This article will guide me through on the right lenses I should for. Hope that answers your question. Nearsightedness and farsightedness are corrected according to the numbers in the Sphere (SPH) section of a prescription. If you go through them to make a purchase we will earn a commission at no extra cost to you but helps support our website. For the mildest of single-vision prescriptions, those ranging from -2.00 to +1.00 or lower on the SPH and +/- 2.00 or lower on the CYL, the recommended lens is the 1.50 standard-index lens, which is free at Zenni Optical. What type of lens would be better for my RX? Trivex: How Does It Compare to High Index Plastic? the patient that in order to get the lenses in their best form, another It’s as necessary as your prescription to get glasses online.). Thank you very much for sharing your knowledge with the rest of us mortals. High-index lenses could reflect much more light than standard plastic and glass lenses, which means if you want to be able to have the best optical clarity out of your high-index lenses you will need to add an anti-reflective coating to your lenses. After all, glasses are glasses, right? I got new insights from your helpful post. 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. The answer to this question depends mostly on your prescription and a little on your budget. It’s recommended for rimless, children’s, and sports eyeglasses because of its unequaled impact resistance. However, like the 1.53 Trivex lens, it cannot be tinted, although it is available in glare-reducing polarized sunglasses and photochromic “auto-tinting” lenses, which turn dark in the bright sunlight and become clear again when you are out of the sun. In some instances, the retailer or your local optician may have a buyer satisfaction policy that protects you from lens changes for a period of days, usually 30 – 60 days. Polycarbonate is the standard choice for almost all eyewear that requires shatter and/or chip resistance. Rimless, eight-hole drilled, anti-reflective lenses for looking at Example 4 These are Learn how your comment data is processed. Thanks for stopping by! The highest index single-vision lens we offer is the 1.74 high-index polymer lens. strength makes a 1.67 material a good choice for drilled rimless. It covers SPHs of -4.00/+2.00 or lower, CYLs of +/-4.00 or lower, and an ADD power of +3.00 or lower. Reproduction in whole or in part without permission is prohibited. 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. the computer screen all day, fabricated with 1.67 drillable material share. Your email address will not be published. Glad you found the information helpful to you. It has incredible impact resistant abilities making it a great choice for bulletproof glass and fighter jet cockpits among other things. A less severe 1.67 Hi-Index provides you with slightly better clarity. It's so EZ to expand your eyewear collection with our portfolio of frames under $25. Due to its popularity, when a new version of a lens add-on is released, it tends to be available with polycarbonate first. They are remarkably thin lenses and remain an excellent choice for anyone seeking comfort paired with sharp, minimally distorted vision. AR coating is also listed with a 2 year warantee. If it is, why do they still sell poly? I was told that going with polycarbonate and not HI-index lenses can damage your eyesight eventually. Learn the pros and cons of Trivex lenses. At this index level, you will begin to benefit from a significantly thinner lens, as we mentioned briefly above. It’s up to 10X more impact-resistant than high-index lenses and is therefore the ideal lens material for sports protective eyewear and children’s glasses. High index lenses refract light more efficiently than lower index lenses resulting in a much thinner lens overall. Polycarbonate vs. High Index Lenses. How to clean polycarbonate and high-index lenses? It's kind of fun to do the impossible. The patient selected a fashionable, rectangular frame, 52-20, and is