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2. Stroboscopic effect - Wikipedia

   en.wikipedia.org/wiki/Stroboscopic_effect

   The contrast threshold function shows that at modulation frequencies near 100 Hz, stroboscopic effect will be visible at relatively low magnitudes of modulation. Although stroboscopic effect in theory is also visible in the frequency range below 100 Hz, in practice visibility of flicker will dominate over stroboscopic effect in the frequency ...

3. Stroboscope - Wikipedia

   en.wikipedia.org/wiki/Stroboscope

   In its simplest mechanical form, a stroboscope can be a rotating cylinder (or bowl with a raised edge) with evenly spaced holes or slots placed in the line of sight between the observer and the moving object. The observer looks through the holes/slots on the near and far side at the same time, with the slots/holes moving in opposite directions.

4. Zenni Optical - Wikipedia

   en.wikipedia.org/wiki/Zenni_Optical

   Zenni Optical mail order. Zenni Optical was founded in 2003 by Tibor Laczay and Julia Zhen. [1] [2] Before being renamed to Zenni Optical when it began offering $7 and $8 glasses, the company was named 19dollareyeglasses.com. [3] [4] [5] Around 2014, co-founder Zhen acquired the building occupied by the Marin Independent Journal to house Zenni. [6]

5. 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]

6. Illusory motion - Wikipedia

   en.wikipedia.org/wiki/Illusory_motion

   Billboards and other electronic signs use apparent motion to simulate moving text by flashing lights on and off as if the text is moving.. The term illusory motion, or motion illusion or apparent motion, refers to any optical illusion in which a static image appears to be moving due to the cognitive effects of interacting color contrasts, object shapes, and position. [1]

7. NY offering free I Love NY eclipse glasses. Here's where you ...

   www.aol.com/ny-offering-free-love-ny-072024485.html

   Free limited-edition I LOVE NY eclipse glasses will be available at 30 different service areas ... open 9 a.m.-4 p.m. Tuesday-Friday and 9 ... 43350 Collins Landing Road (near the Thousand ...