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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

    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 ), where the two ...

  4. 10 Things To Know Before Using Costco Optical - AOL

    www.aol.com/10-things-know-using-costco...

    HD progressive and polarized lenses. Transitions photochromic lenses. Blue-light blocking technology. Anti-reflective lenses. 1.60 high-index lenses. Universal-fit frames. Multi-functional lenses.

  5. Serengeti Eyewear - Wikipedia

    en.wikipedia.org/wiki/Serengeti_Eyewear

    Serengeti sunglasses include tinted photochromic and polarized lenses. [ 4 ] Tucker Viemeister designed aviator style sunglasses in sepia tones for Serengeti in the 1980s.

  6. Why Blue Light Glasses May End Up Preventing Disrupted Sleep

    www.aol.com/why-blue-light-glasses-may-212200136...

    The photochromic lenses available on Ray-Ban's blue light glasses shift in tint throughout the day depending on lighting, and are fitted with anti-reflective treatments and UV filters for ...

  7. Transitions Optical - Wikipedia

    en.wikipedia.org/wiki/Transitions_Optical

    Transitions Optical is a U.S.-based company known for manufacturing photochromic lenses, which darken on exposure to specific types of light. The company was founded in 1990. [1] In 1991, Transitions Optical became the first company to commercialize and manufacture plastic photochromic lenses. [2]

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