info prev up next book cdrom email home

Ponzo's Illusion


The upper Horizontal line segment in the above figure appears to be longer than the lower line segment despite the fact that both are the same length.

See also Illusion, Müller-Lyer Illusion, Poggendorff Illusion, Vertical-Horizontal Illusion


Fineman, M. The Nature of Visual Illusion. New York: Dover, p. 153, 1996.

© 1996-9 Eric W. Weisstein