June 16, 2005

Optical Illusions

From David Pogue's New York Times blog comes this:
Technology /
Pogues Posts: A Wacky Persistence of Vision Test
New York Times, June 10, 2005
This wild and wacky persistence-of-vision test is a new one on me. There is absolutely, positively no green in this circle of dots--but even I, Mr. Color-blind, saw phantom green spots after only about three seconds.

[swb note: there are many more optical illusions at this site, including face perception & emotion and a cool "stepping feet" illusion]

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