Encyclopedia of Clinical Neuropsychology

2018 Edition
| Editors: Jeffrey S. Kreutzer, John DeLuca, Bruce Caplan

Metamorphopsia

  • Kerry DonnellyEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-57111-9_750

Synonyms

“Alice in Wonderland” syndrome

Definition

General term for a range of visual perceptual disorders in which the apparent shape, size, outline, color, number, movement, or other physical characteristics of visual objects are distorted.

Current Knowledge

Distortions of visual perception can be elementary or complex. Examples of the former might include perceiving objects as smaller (micropsia) or larger (micropsia) than they actually are, seeing them as inverted, losing their color (achromatopsia), or seeing stationary objects as if they were in motion. More complex illusions include seeing objects as smaller and fading into the distance or becoming larger as they approach the observer, there may be a visual multiplication of the object (polyopia) or a persistence of the image in its absence (palinopsia), or spatial displacement of an object. This disorder may result from a variety of conditions, including epilepsy, migraines, toxic or metabolic disorders, vascular or neoplastic...

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References and Readings

  1. Hecaen, H., & Albert, M. L. (1978). Human neuropsychology, chap. 4. Disorders of visual perception (pp. 128–247). New York: Wiley.Google Scholar

Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.VA WNY Healthcare SystemUniversity of Buffalo (SUNY) Behavioral Health Careline (116B)BuffaloUSA