scintillating scotoma

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scotoma

 [sko-to´mah] (Gr.)
1. an area of lost or depressed vision within the visual field, surrounded by an area of less depressed or of normal vision.
2. mental scotoma. adj., adj scotom´atous.
absolute scotoma an area within the visual field in which perception of light is entirely lost.
annular scotoma a circular area of depressed vision surrounding the point of fixation.
arcuate scotoma an arc-shaped defect of vision arising in an area near the blind spot and extending toward it.
central scotoma an area of depressed vision corresponding with the fixation point and interfering with or abolishing central vision.
centrocecal scotoma a horizontal oval defect in the visual field situated between and embracing both the fixation point and the blind spot.
color scotoma an isolated area of depressed or defective vision for color in the visual field.
hemianopic scotoma depressed or lost vision affecting half of the central visual field; see also hemianopia.
mental scotoma in psychiatry, a figurative blind spot in a person's psychological awareness, the patient being unable to gain insight into and to understand his mental problems; lack of insight.
negative scotoma a scotoma appearing as a blank spot in the visual field; the patient is unaware of it, and it is detected only by examination.
peripheral scotoma an area of depressed vision toward the periphery of the visual field.
physiologic scotoma that area of the visual field corresponding with the optic disk, in which the photosensitive receptors are absent.
positive scotoma one which appears as a dark spot in the visual field.
relative scotoma an area of the visual field in which perception of light is only diminished, or loss is restricted to light of certain wavelengths.
ring scotoma annular s.
scintillating scotoma blurring of vision with the sensation of a luminous appearance before the eyes, with a zigzag, wall-like outline; called also teichopsia.

scin·til·lat·ing sco·to·ma

a localized area of blindness edged by brilliantly colored shimmering lights (teichopsia); usually a prodromal symptom of migraine.
See also: fortification spectrum.
Synonym(s): flittering scotoma

scintillating scotoma

[sin′tilā′ting]
Etymology: L, scintillatio, sparkling; Gk skotos dark, oma tumor
an abnormal area of the visual field that is positive and luminous, sometimes becoming hemianopic and appearing in a migraine aura.
An angled figure near the point of fixation, which gradually spreads and assumes a lateral convex shape with a scintillating edge, leaving a varying amount of scotomata in its wake, which is characteristic of the aura that precedes visual migraines. This phenomenon was also know by the fanciful term, Maginot line pattern, so named for the jagged, slightly off-center lines

scin·til·lat·ing sco·to·ma

(sin'ti-lāt'ing skō-tō'mă)
A localized area of blindness edged by brilliantly colored shimmering lights (teichopsia); usually a prodromal symptom of migraine.
See also: fortification spectrum

scin·til·lat·ing sco·to·ma

(sin'ti-lāt'ing skō-tō'mă)
Localized area of blindness edged by brilliantly colored shimmering lights; usually prodromal symptom of migraine.