positive spontaneous visual phenomenon

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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  • 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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