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2. Photosensitive glass - Wikipedia

   en.wikipedia.org/wiki/Photosensitive_glass

   Photosensitive glass vase. Photosensitive glass, also called photostructurable glass (PSG) or photomachinable glass, is a glass in the lithium-silicate family of glasses onto which images can be etched using shortwave radiations, such as ultraviolet. [1]

3. Spiropyran - Wikipedia

   en.wikipedia.org/wiki/Spiropyran

   Photochromic compounds based on spiropyrans, spirooxazines, and [2H]chromenes were developed as silver-free light-sensitive properties that could be used for self-darkening glasses, optical recording data, including thin films, photoswitches (sensors that discern light of certain wavelength), light filters with modulated transmission and ...

4. 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]

5. 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.

6. Three-point lighting - Wikipedia

   en.wikipedia.org/wiki/Three-point_lighting

   The addition of a fourth light, the background light, makes for a four-point lighting setup. The background light is placed behind the subject(s), on a high grid, or low to the ground. Unlike the other three lights, which illuminate foreground elements like actors and props, it illuminates background elements, such as walls or outdoor scenery.

7. Crypto markets steady after Trump's first policy move

   www.aol.com/news/crypto-markets-lose-steam...

   NEW YORK/SINGAPORE/PARIS (Reuters) -Crypto markets crept up on Friday, still holding below recent highs even after President Donald Trump ordered a new working group to draw up crypto regulations ...

8. What Are Stylish Women Covering Their Heads With? Anything ...

   www.aol.com/stylish-women-covering-heads...

   Bonnets, bandanas, balaclavas—even the humble scarf—are replacing our beanies and caps. Shop picks from Zara, Aritizia, Jacquemus and more.

9. Raw pet food pulled after cats die with bird flu. Check these ...

   www.aol.com/two-oregon-cats-euthanized...

   Despite pet deaths, recalls and health authority warnings, raw pet food has grown into a $3 billion industry in the U.S. Domestic cats have been known to carry bird flu since 2004.