|
|
|
The Horizontal line segment in the above figure appears to be shorter than the Vertical line segment, despite the fact that it has the same length.
See also Illusion, Müller-Lyer Illusion, Poggendorff Illusion, Ponzo's Illusion
References
Fineman, M. The Nature of Visual Illusion. New York: Dover, p. 153, 1996.