Scotoma

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Related to arcuate scotoma: paracentral scotoma, centrocecal scotoma

scotoma

[skə′tō·mə]
(medicine)
A blind spot or area of depressed vision in the visual field.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Scotoma

 

a blind area within the visual field, not affecting the surrounding area of the eye. Physiologic scotoma is that area of a healthy eye’s visual field corresponding with the optic disk, which does not have photoreceptors. Pathologic scotoma is a diagnostic symptom of many diseases, including retinitis and atrophy of the optic nerve. It is perceived as a dark spot (positive scotoma) or as a blank spot (negative scotoma) that can be detected only through special testing. During teichopsia (scintillating scotoma), which lasts 20–30 minutes, flickering is perceived along the eye’s periphery; the condition is usually accompanied by persistent headaches, nausea, and vomiting. Treatment of scotoma is directed toward the underlying disease.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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In this study, typical arcuate scotoma was the most frequent type of early changes in VF in normal-tension glaucoma.
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Some functional and structural changes, including arcuate scotoma and flame-shaped retinal hemorrhage matching the distribution of this network, imply the possible relationship between RPCs and certain optic neuropathies such as glaucoma [3, 4].