- positive spontaneous visual phenomenon
- (PSVP)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.ReferencesVaphiades, M.S. (2000). Disorders ofvisual integration. American Orthoptic Journal, 50, 101106.
Dictionary of Hallucinations. J.D. Blom. 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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radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… … Universalium
literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… … Universalium
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