![]() Photochromic lenses cost more than standard clear prescription lenses, but you typically will save money compared with buying a second pair of prescription glasses with sunglass And because you will only need one pair of glasses indoors and in the sun, you won't have to worry about forgetting to bring your sunglasses with you wherever you go. Photochromic lenses are available in a wide variety of materials and designs, including progressive lenses if you have a bifocal eyeglass prescription. These lenses are clear indoors, darken automatically in sunlight and provide 100 percent UV protection. Consider purchasing photochromic lenses for your next pair of glasses. Any suggestions? - F.R., ArizonaĪ: Absolutely. Q: I know it's important to wear sunglasses that block UV outdoors, but I wear prescription glasses and I don't want to always have to bring a pair of prescription sunglasses with me wherever I go. It takes just a few seconds to insure you are properly protected. If you have doubts about your sunglasses, many eye care practitioners and optical shops have a device that can measure the amount of UV protection your lenses provide. It's important to make sure your sunglasses have quality lenses that block 100 percent of the sun's harmful UV rays. Q: Can't sunglasses be dangerous for the eyes because they dilate the pupil and allow more UV to reach the lens and retina? - R.G., IllinoisĪ: This may be true with cheap sunglasses that don't provide adequate UV protection. Most professional optical dispensaries have a demonstration display of how polarization works - check it out. In other words, it blocks the light that reflects in from water or the highway, reducing glare. The polarization actually cuts out the light coming from the horizontal meridian while allowing in the light coming in from the vertical meridian. Q: Are there any doctor recommendations for polarized sun lenses? - L.K., OhioĪ: Polarized lenses are great for those who spend time on water, drive a lot, etc. It is the original tint that Bausch + Lomb used in their Ray-Ban sunglasses for pilots. The lens tint I prefer in my sunglasses is called G-15, which is a combination of gray and green. Sunglasses with gray lenses will darken the world without altering your color perception. It's also important to get sunglasses with quality lenses that are free from optical distortions. The most important feature to look for in a sunglass lens is how much UV radiation it absorbs - you want 100 percent for maximum protection. Perceptions of color, brightness and contrast, and some don't. Shown here are four of the many options in the Xperio line of polarized lenses.Ī: Sunglass lens colors are really a personal preference. Q: What is the best color for prescription sunglass lenses? - J.N., Pennsylvaniaįor prescription sunglasses, you'll want a lens tint that helps your eyes feel comfortable and, depending on your activities, perform best. Mark Mattison-Shupnick, master optician To know that your sunglasses provide 100 percent UV protection, purchase them from reputable companies, specialty sunglass stores or from an optical professional. Sunglasses without this extra glare-blocking feature). Lenses may also be made of other acrylic materials, which will vary in how much UV protection they provide.Īll sunglasses with polarized sunglasses block 100 percent UV, regardless of the lens material or price of the eyewear (though polarized sunglasses tend to be more expensive than This material absorbs only about 40 percent of the UV rays. Many cheap sunglasses use a material called triacetate. Plastic sunglass lenses block about 88 percent UV polycarbonate lenses block 100 percent UV. The determining factor is the lens material and any additional UV-blocking coatings that may be applied. But how do I really know? - M.D., North CarolinaĪ: The amount of UV protection that sunglasses provide cannot be determined by the color of the lenses, the country of origin or the price of the eyewear. Q: How can I find inexpensive sunglasses that are guaranteed to block 100 percent UV? Many are made in China and say 100 percent UV protection. Having said that, I do highly recommend quality lenses for best comfort and vision - both in regular glasses and sunglasses. But remember, even clear lenses can have 100 percent UV protection. Is this correct, or are any sunglasses better than none? - G.H., MalaysiaĪ: I have heard this as well, but I've never seen any confirming studies. ![]() Apparently, when one wears sunglasses the pupil widens if the sunglasses have poor UV protection, then the eyes are damaged more by the sun's rays. Q: I've heard that cheap sunglasses can be more damaging to your eyes than wearing no sunglasses at all. Questions answered by Burt Dubow, OD, Charles Slonim, MD, Gary Heiting, OD, and master optician Mark Mattison-Shupnick
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