Photopsia Pho*top"si*a, n. [NL., fr. Gr. fw^s, fwto`s, light + ? sight.] (Med.) An affection of the eye, in which the patient perceives luminous rays, flashes, coruscations, etc. See {phosphene}. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Photopsia — is the presence of perceived flashes of light. It is most commonly associated with posterior vitreous detachment, migraine with aura, migraine aura without headache, retinal break or detachment, occipital lobe infarction and sensory deprivation… …   Wikipedia

  • photopsia — /fō topˈsi ə/or photopsy / topˈsi/ noun (Gr opsis appearance) the appearance of flashes of light, owing to irritation of the retina • • • Main Entry: ↑photo …   Useful english dictionary

  • 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

  • photopsia — noun The presence of perceived flashes of light …   Wiktionary

  • photopsia — A subjective sensation of lights, sparks, or colors due to electrical or mechanical stimulation of the ocular system. SEE ALSO: Moore lightning streaks, under streak. SYN: photopsy. [photo + G. opsis, vision] * * * pho·top·sia fō täp sē ə …   Medical dictionary

  • photopsia — n. the sensation of flashes of light caused by mechanical stimulation of the retina of the eye, usually due to traction by the attached vitreous humour when the eye is moved …   The new mediacal dictionary

  • 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

  • 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 …   Dictionary of Hallucinations

  • Фотопсия (Photopsia) — субъективное ощущение вспышек света, возникающее в результате механического раздражения сетчатки глаза (обычно оно наблюдается при вытяжении стекловидного тела во время движения глаза). Источник: Медицинский словарь …   Медицинские термины

  • фотопсия — (photopsia; фото + греч. opsis зрение) появление в поле зрения мелькающих искр, пятен, зигзагообразных линий и т. п.; возникает при поражениях сетчатки, а также в качестве элементарных зрительных галлюцинаций при некоторых психических… …   Большой медицинский словарь

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