scotoma


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sco·to·ma

 (skə-tō′mə)
n. pl. sco·to·mas or sco·to·ma·ta (-mə-tə)
An area of diminished vision within the visual field.

[New Latin scotōma, from Late Latin, dim sight, from Greek skotōma, dizziness, from skotoun, to darken, from skotos, darkness.]

sco·to′ma·tous adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

scotoma

(skɒˈtəʊmə)
n, pl -mas or -mata (-mətə)
1. (Pathology) pathol a blind spot; a permanent or temporary area of depressed or absent vision caused by lesions of the visual system, viewing the sun directly (eclipse scotoma), squinting, etc
2. (Psychology) psychol a mental blind spot; inability to understand or perceive certain matters
[C16: via Medieval Latin from Greek skotōma giddiness, from skotoun to make dark, from skotos darkness]
scotomatous adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

sco•to•ma

(skoʊˈtoʊ mə)

n., pl. -mas, -ma•ta (-mə tə)
loss of vision in a part of the visual field; blind spot.
[1535–45; < Greek skótōma dizziness = skotō-, variant s. of skotoûn to darken, stupefy, make dizzy, v. derivative of skótos darkness, dizziness + -ma resultative n. suffix]
sco•tom′a•tous (-ˈtɒm ə təs) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

scotoma, scotomy

a blind spot or blind area in the field of vision.
See also: Blindness
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.scotoma - an isolated area of diminished vision within the visual fieldscotoma - an isolated area of diminished vision within the visual field
vision defect, visual defect, visual disorder, visual impairment - impairment of the sense of sight
annular scotoma - a circular scotoma surrounding the center of the field of vision
central scotoma - a scotoma that involves the fixation point
hemianopic scotoma - a scotoma involving half of the visual field
paracentral scotoma - a scotoma that is adjacent to the fixation point
flittering scotoma, scintillating scotoma - a localized area of diminished vision edged by shimmering colored lights; in many people it indicates the onset of migraine
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations

sco·to·ma

n., Gr. escotoma, área del campo visual en la cual existe pérdida parcial o total de la visión.
English-Spanish Medical Dictionary © Farlex 2012
References in periodicals archive ?
* A dense scotoma to the right of the PRL (radial 3) was associated with more right errors ([chi square] = 4.1, p = 0.05).
Patients may experience a variety of visual disturbances from asymptomatic to a sudden onset of blurred vision, micropsia, metamorphopsia, dyschromatopsia, or paracentral scotoma [1].
d) Symptoms often include metamorphopsia, blurred vision and relative positive scotoma
Absolute and relative scotoma was present centrally in the area of hemorrhage (Figure 3A).
Table 4: Adverse effects of grid laser Adverse Effects Adverse Effects Eyes which underwent grid laser (n=30) Pre-treatment Post-treatment 3 Months 6 Months 1 Year Worsening of 0 3 2 1 Macular Edema (-ve Funduscopic findings) Retinal Hemorrhages 0 1 1 0 Para central Scotoma 0 1 1 1 Vitreous Contraction 0 1 0 0 Adverse effects (Table 4) noted at 3 months were: there was worsening of macular edema in three eyes, retinal hemorrhage in one eye, vitreous contraction in one eye and paracentral scotoma in one eye.
Although missing an object may indicate larger central or paracentral scotomas, an object that appears distorted may indicate macular edema or some perceptual distortions in or around a scotoma that may be due to perceptual "filling in" (Wittich, Overbury, Kapusta, Watanabe, & Faubert, 2006).
All patients recovered visual acuity to 20/30 or better with residual central scotoma by 12 weeks.
Her migraines occur about once a month, and she reports classic symptoms of aura, scintillating scotoma, right retroorbital pain, and nausea.
Only the patients with scotoma on single localisation or with preperimetric glaucoma were recruited.
Left eye computerized visual field examination (24-2 Sita Standard, Humphrey field analyzer MODEL 740i, Carl Zeiss Meditec, Inc, Dublin, CA, USA) revealed an enlarged blind spot, a dense altitudinal superior scotoma and a slight diffuse reduction of sensitivity in the inferior hemifield.
These headaches also caused significant disruption to his vision and were preceded by flashing lights appearing in an oval-shaped cluster to the left of his fixation; after 15 minutes these lights developed into a large oval-shaped white scotoma. After some time, the scotoma would enlarge and include coloured lights.
OCT showed normal foveal contour with remnants of ILM (Figure 6) seen over the macula with recovery of vision to 20/20 without any metamorphopsia or scotoma.