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2. PRISM - Wikipedia

   en.wikipedia.org/wiki/PRISM

   PRISM is a code name for a program under which the United States National Security Agency (NSA) collects internet communications from various U.S. internet companies ...

3. GlassesUSA - Wikipedia

   en.wikipedia.org/wiki/GlassesUSA

   It was founded in 2009 by Daniel Rothman, Eldad Rothman and Roy Yamner. Daniel Rothman is the current CEO of the company. [4] The company primarily focuses on North America, but also accepts orders from 92 countries. [5]

4. America's Best Contacts & Eyeglasses - Wikipedia

   en.wikipedia.org/wiki/America's_Best_Contacts...

   America's Best Contacts & Eyeglasses is a discount provider of eye examinations, eyeglasses and contact lenses, with over 1000 retail locations in the United States as of May 31, 2024. The millennial store is located in Philadelphia, PA, which happened to be one of National Vision's first markets in their early days over 40 years ago.

5. Maddox rod - Wikipedia

   en.wikipedia.org/wiki/Maddox_rod

   The strength of the prism is increased until the streak of the light passes through the centre of the prism, as the strength of the prism indicates the amount of deviation present. The Maddox rod is a handheld instrument composed of red parallel plano convex cylinder lens , which refracts light rays so that a point source of light is seen as a ...

6. Deck prism - Wikipedia

   en.wikipedia.org/wiki/Deck_prism

   Group of original deck prisms. A deck prism, or bullseye, is a prism inserted into the deck of a ship to provide light down below. [1] [2] [3]For centuries, sailing ships used deck prisms to provide a safe source of natural sunlight to illuminate areas below decks.

7. Lenticular printing - Wikipedia

   en.wikipedia.org/wiki/Lenticular_printing

   Close-up of the surface of a lenticular print. Lenticular printing is a technology in which lenticular lenses (a technology also used for 3D displays) are used to produce printed images with an illusion of depth, or the ability to change or move as they are viewed from different angles.