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.

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

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.

scotoma, scotomy

a blind spot or blind area in the field of vision.
See also: Blindness
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
Translations

sco·to·ma

n., Gr. escotoma, área del campo visual en la cual existe pérdida parcial o total de la visión.
References in periodicals archive ?
In addition, blurred vision, a change in colour perception, central scotoma, headaches, retro-orbital pain precipitated by eye movements and flashes of light or black squares (phosphenes) are characterized by optic neuritis.
For people with a scotoma, this may make an object easier to see because, although the retinal image size increases, the area of visual loss remains the same size.
Visual field tests were divided into six categories: no abnormality, decreased retinal sensitivity, paracentral scotoma, concentrically narrowed visual field, arch scotoma, and quadrant irregularities.
This is associated with visual loss and a positive scotoma.
The most common neuro-ophthalmological disorders were visual field scotoma, decrease in VA, optic nerve head atrophy, color vision disturbances and relative afferent pupillary defect (RAPD), while papilledema and oculomotor paresis were seen much less frequently (Table 1).
The particular disorders have been diverse and include glaucoma or otherwise restricted visual fields (1-8), scotoma (9,10), diminished visual acuity (6,11) and diplopia (12).
The authors note that the study is limited by the small number of participants, who may not be representative of all users, and that a larger sample is needed to identify factors that influence scotoma size and depth.
The disappearance of visual scotoma and arthralgia came next, which led to hospital discharge as soon as the 15-day antimicrobial treatment was concluded.
A centrocaecal scotoma is typical in optic neuritis and a RAPD is present in the affected eye.
Central visual field characteristics, including fovea and central scotoma characteristics, were measured with a scanning laser ophthalmoscope (SLO) (model 101, Rodenstock; Munich, Germany).
The patient was a 43-year-old German woman who sought care during July 2010, after 4 days of perceiving flashing lights in her visual field and a paracentral scotoma in her left eye.