teichopsia

teichopsia
   Also known as fortification spectrum, fortification figure, fortification of Vauban, geometrical spectrum, herringbone, Norman arch, scintillating scotoma, and flittering scotoma. The term teichopsia comes from the Greek words teichos (wall), and opsis (seeing). Its introduction is attributed to the British physician Hubert Airy (1838-1903). Today it is used to denote a * geometric visual hallucination consisting of an extremely bright, sometimes coloured, zigzag line or 'fortification wall', which may begin near the fovea in one hemifield, and then spread out towards the periphery of the hemifield without touching the vertical meridian. For a further description of this phenomenon, see the entry Fortification spectrum.
   References
   Airy, H. (1870). On a distinct form of transient hemiopsia. Philosophical Transactions ofthe Royal Society ofLondon, 160, 247-264.
   Levene, J.R. (1975). Sir G.B. Airy, F.R.S. (18011892) and the symptomatology of migraine. Notes and Records ofthe Royal Society of London, 30, 15-23.
   Wilkinson, F. (2004). Auras and other hallucinations: Windows on the visual brain. Progress in Brain Research, 144, 305-320.

Dictionary of Hallucinations. . 2010.

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  • teichopsia — /tī kopˈsi ə/ noun Temporary blurring of vision, or partial blindness, with the appearance of a multi coloured zigzag of light before the eye, accompanying migraine ORIGIN: Gr teichos wall, and opsis sight …   Useful english dictionary

  • teichopsia — The jagged, shimmering visual sensation resembling the fortifications of a walled medieval town; the scintillating scotoma of migraine. [G. teichos, wall, + opsis, vision] * * * n. shimmering coloured lights, accompanied by blank spots in the… …   Medical dictionary

  • teichopsia — n. shimmering coloured lights, accompanied by blank spots in the visual field (transient scotomata), often seen by sufferers at the beginning of an attack of migraine …   The new mediacal dictionary

  • flittering scotoma — teichopsia …   Medical dictionary

  • Migraine — This article is about the disorder. For other uses, see Migraine (disambiguation). Migraine Classification and external resources The pain of a migraine headache can be debilitating. ICD 10 …   Wikipedia

  • migraine — A symptom complex occurring periodically and characterized by pain in the head (usually unilateral), vertigo, nausea and vomiting, photophobia, and scintillating appearances of light. Classified as classic m., common m., cluster headache,… …   Medical dictionary

  • Aura — A premonition. There is often an aura before a migraine or a grand mal seizure. The aura, a symptom of brain malfunction, may consist of flashing lights, a gleam of light, blurred vision, an odor, the feeling of a breeze, numbness, weakness, or… …   Medical dictionary

  • Ophthalmic migraine — Migraine involving the eyes but without headache. Migraine, due to a spasm of blood vessels in the brain, usually causes a headache. Flashes of light may appear as jagged lines or heat waves in one or both eyes and often last 10 20 minutes… …   Medical dictionary

  • scotoma — 1. An isolated area of varying size and shape, within the visual field, in which vision is absent or depressed. 2. A blind spot in psychological awareness. [G. skotoma, vertigo, fr. skotos, darkness] absolute s. a s. in which there is no… …   Medical dictionary

  • fortification of vauban —    Also known as fortification figure, fortification spectrum, flittering scotoma, geometrical spectrum, herringbone, Norman arch, scintillating scotoma, telehopsia, and teichopsia. The introduction of the eponym fortification of Vauban stems… …   Dictionary of Hallucinations

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