structured photopsia

   A term used to denote a type of * photopsia (i.e. light flashes) depicting geometric patterns such as circles, squares, hexagonal shapes, etc. The term structured photopsia is used in opposition to *unstructured photopsia and *phosphene. Patho-physiologically, the mediation of structured pho-topsia has historically been associated primarily with aberrant neurophysiological activity in pres-triate cortical neurons.
   Amos, J.F. (1999). Differential diagnosis of common etiologies of photopsia. Journal of the American Optometric Association, 70, 485-504.

Dictionary of Hallucinations. . 2010.

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  • photopsia —    Also known as photome, phosphorescence of the retina, scintillations, and suffusio scintillans. The term photopsia comes from the Greek words photizein (to give light, to illuminate) and opsis (seeing). It is used to denote a group of * simple …   Dictionary of Hallucinations

  • unstructured photopsia —    Also known as phosphene. Both terms are used to denote a type of *photopsia (i.e. a flash of light ) consisting of an unformed shape. The term unstructured photopsia is used in opposition to * structured photopsia. Pathophysiologically, the… …   Dictionary of Hallucinations

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