colour scotoma

colour scotoma
   A term used to denote a variant of * achromatopsia, characterized by the inability or diminished ability to perceive a specific colour within an island-shaped part of the visual field.
   References
   Zeki, S. (1990). A century of cerebral achromatopsia. Brain, 113, 1721-1777.

Dictionary of Hallucinations. . 2010.

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