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Previous optical Illusion of the Month (August-September 2007)

by Gianni A. Sarcone and Marie-Jo Waeber


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'What's wrong with this picture' challenge

Terrace dilemma
Which way is the man facing?
(time allowed: 5 minutes)

Terrace dilemma
source: Eye Tricks, ISBN 1844427773



solutionThere are two possible ways to perceive the image: either above (fig. a) or below (fig. b) the viewer's eye level. These kinds of illusions are known as bistable or ambiguous figures.

- G. Sarcone

You're encouraged to expand and/or improve this article. Send your comments, feedback or suggestions to Gianni A. Sarcone. Thanks!

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