September 27, 2002
1:27 AM Subscribe
A professor of vision science at MIT understands that life isn't just black and white, even though we often see it that way. This amazing illusion proves it, and these slick, fast-loading, Flash demonstrations of lightness perception show how it's done. (My favorite is the "Koffka Ring".) White paper here, for deeper background.
(I came across the checker-shadow illusion via interconnected, who found it via scribot.)