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scotoma

DEFINITIONS OF: scotoma

1

n an isolated area of diminished vision within the visual field

Types:
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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
Type of:
vision defect, visual defect, visual disorder, visual impairment
impairment of the sense of sight
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