Monday, October 15, 2007

Optical illusion

The first time I saw this optical illusion, I was tricked. I believed naively that it had something to do with left brains and right brains.

From time to time, the spinning woman seems to change directions, going suddenly from from clockwise to anticlockwise, or vice versa. It's easy to find an explanation for this illusion on the web. It all depends on when the viewer's brain suddenly decides spontaneously that the direction should change. There's no real trick, simply a finely-designed demo.

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