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April 4, 2011 04:51 pm PDT
Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/1UY52o0oMYY/optical-illusion-spi.html
Optical illusion spiral table
Etsy seller ExoticTiles made this eye-watering optical illusion table out of hand-cut tiles. It's $500 plus your optometry and psychoanalyst bills. The effect is called a Caf wall illusion. This table is made from hand-cut and hand-glazed trapezoidal tiles. It comprises four concentric circles (believe it or not!) around a central disc. The way the brain processes contrast information causes one to perceive the circles as narrowing. Each circle contradicts the ones beside it. Caf Wall Illusion Table (Thanks, Kim!)...
Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/1UY52o0oMYY/optical-illusion-spi.html
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