Also known as distortion. Both terms are indebted to the Latin adjective distortus,which means twisted. They are used to denote a type of * visual illusion characterized by changes in the perceived size, length or curvature of a given object. Some well-known examples of distortion illusions are *geometric-optical illusions such as the * Café Wall illusion and the * Müller-Lyer illusion. The term distortion illusion is used in opposition to the terms * ambiguous illusion, * paradox illusion, and *fiction illusion.
References
Gregory, R.L. (1991). Putting illusions in their place. Perception, 20, 1-4.
Dictionary of Hallucinations. J.D. Blom. 2010.