This lens treatment enables eyeglass lenses to darken automatically in response to the sun's UV and high-energy visible (HEV) light rays, and then quickly return to clear (or nearly clear) when indoors. Photochromic lenses are available in virtually all lens materials and designs.
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Polarized sunglasses have been popular for years with boaters and fishermen who need to reduce reflected glare from the water surrounding them. But now that many others who spend time outdoors have discovered the benefits of polarized lenses, interest in these types of sunglasses has soared.
Besides boaters, outdoor enthusiasts who benefit the most from polarized sunglasses include skiers, bikers, golfers, and joggers since all of these activities require the elimination of glare for optimum safety and performance.
Polarized sunglasses can be helpful for driving, too, because they reduce glare-causing reflections from flat surfaces, such as the hood of the car or the road's surface.
Some light-sensitive people, including post-cataract surgery patients and those continually exposed to bright light through windows, may also choose to wear polarized sunglasses indoors.