Tuesday, May 10, 2011
Optical Illusion Keychains from Zazzle.com
Optical Illusion Keychain. Instructions: 1) focus gaze on red dot 2) wait for disk to hover and wiggle over the background design 3) be amazed! We're guessing the effect results from the differing characteristic spatial frequencies of the foreground and background that generate error signals during microsaccades that the brain cannot cancel simultaneously. Science!
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