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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. Lowes, Walmart, Staples selling eclipse glasses ahead of ...

   www.aol.com/lowes-walmart-staples-selling...

   If you're looking for solar eclipse glasses in bulk, Staples offers 50 glasses for $99.99 for online ordering and pick up at one of four locations on the Treasure Coast. Walmart

4. Serengeti Eyewear - Wikipedia

   en.wikipedia.org/wiki/Serengeti_Eyewear

   Serengeti Eyewear is a sunglasses line owned by Bollé Brands. Their main focus is eye protection; the company researches and develops technology such as photochromic lenses, polarized lenses, spectral control, among others.

5. Photochromism - Wikipedia

   en.wikipedia.org/wiki/Photochromism

   One of the most famous reversible photochromic applications is color changing lenses for sunglasses.The largest limitation in using photochromic technology is that the materials cannot be made stable enough to withstand thousands of hours of outdoor exposure so long-term outdoor applications are not appropriate at this time.

6. Eyewear - Wikipedia

   en.wikipedia.org/wiki/Eyewear

   The first incarnations of glasses were made with the aim of providing aid to reading. [ 8 ] Though innovations in pre-modern eyewear technology occurred in both Imperial China and the Inuit territories, which both invented early forms of sunglasses and goggles, [ 9 ] Venice and Northern Italy have historically been the place of consolidation ...

7. Trump leaves China guessing what his next move is with ...

   www.aol.com/trump-leaves-china-guessing-next...

   President-elect Trump took China by surprise when he invited President Xi Jinping to his upcoming inauguration, a friendly gesture ahead of a widely expected trade war.