visual allesthesia


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allesthesia

 [al″es-the´zhah]
the experiencing of a sensation, e.g., pain or touch, as occurring at a point remote from where the stimulus is actually applied.
visual allesthesia the transposition of visual images from one-half of the visual field to the other. Called also optical allachesthesia.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

allesthesia, visual 

A rare disorder in which a visual stimulus located in one half of the visual field is perceived as being located in the other. Occasionally the visual stimulus may be transposed from the lower to the upper quadrant, or vice versa. The condition may occur as a result of damage to the parietal or occipital cortex.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann