positive spontaneous visual phenomenon
   The expression positive spontaneous visual phenomenon is used as an umbrella term for *visual hallucinations that may occur in individuals with impaired vision. Using complexity as a guiding principle, the group of PSVP can be divided into *phosphenes, *photopsias, and *formed visual hallucinations.
   References
   Vaphiades, M.S. (2000). Disorders ofvisual integration. American Orthoptic Journal, 50, 101106.

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

  • phosphene —    Also known as unstructured photopsia. The term phosphene comes from the Greek words phos (light) and phainein (to shine). It is used to denote a transient flash or spark of light, commonly referred to as seeing stars . Phosphenes are * visual… …   Dictionary of Hallucinations

  • PSVP —    see positive spontaneous visual phenomenon …   Dictionary of Hallucinations

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