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2. Photochromic lens - Wikipedia

   en.wikipedia.org/wiki/Photochromic_lens

   A photochromic eyeglass lens, part of the lens darkened after exposure to sunlight while the other part remained covered. A photochromic lens is an optical lens that darkens on exposure to light of sufficiently high frequency, most commonly ultraviolet (UV) radiation. In the absence of activating light, the lenses return to their clear state.

3. Photochromism - Wikipedia

   en.wikipedia.org/wiki/Photochromism

   Photochromism. A photochromic eyeglass lens, after exposure to sunlight while part of the lens remained covered by paper. Photochromism is the reversible change of color upon exposure to light. It is a transformation of a chemical species ( photoswitch) between two forms by the absorption of electromagnetic radiation ( photoisomerization ...

4. Essilor - Wikipedia

   en.wikipedia.org/wiki/Essilor

   After many years as rivals, Essel and Silor merged on 1 January 1972 to form Essilor, then the world's third-largest ophthalmic optical firm. [1] Its first year of existence was marked by the creation of Valoptec, a non-trading company composed of stockholder managers who held half the company's capital stock, and the purchase of Benoist-Bethiot, a French lens manufacturer specializing in ...

5. The Best Sunglasses, Made Even Better - AOL

   www.aol.com/lifestyle/best-sunglasses-made-even...

   Wayfarer Reverse sunglasses. Here's an editor's honest review of the iconic frames for summer. ... The Best Sunglasses, Made Even Better. Trishna Rikhy. July 10, 2024 at 6:00 AM.

6. The 25 Best Sunglasses Brands to Wear Every Damn Day - AOL

   www.aol.com/lifestyle/30-best-sunglasses-brands...

   Randolph Engineering. One of the few big brands doing sunglasses in the U.S. of A., Randolph produces its signature aviators—built to military specifications, so you know they're tough as nails ...

7. The 15 Best Sunglasses, According to BAZAAR Editors - AOL

   www.aol.com/lifestyle/14-best-sunglasses...

   Shop the best sunglasses of 2023 tested by BAZAAR editors, including frames for every face shape and style from Miu Miu, Ray-Ban, and more. The 15 Best Sunglasses, According to BAZAAR Editors Skip ...