Triple Eye Light Stick: Exhibit Demo

Turn a rapidly flickering light into a complete image by shaking your head.

November 20, 2015 • 03:08

A line of flickering light is just a line, right? Maybe, or maybe not—try shaking your head, and see what appears. Persistence of vision makes a rapidly flickering line of light appear as a complete image on the back of your eye. This "loophole" in your vision system has been used by television programmers for years. See what you can see!

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persistence of vision

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