Definition of scotoma in US English:

scotoma

nounPlural scotomas, Plural scotomata

Medicine
  • A partial loss of vision or blind spot in an otherwise normal visual field.

    • ‘The ability to read with visual aids depends on the size and density of the central scotoma and the degree to which the person retains sensitivity to contrast.’
    • ‘Patients with age-related macular degeneration may complain of acute loss of vision, blurred vision, scotomas or chronic distortion of vision.’
    • ‘At each monthly visit patients should be questioned regarding possible visual disturbances including blurred vision or scotomata.’
    • ‘Half of them had clear prodromata, such as scintillating scotomas and sensitivity to odors and noise.’
    • ‘The patient performs this test daily at home and is instructed to call the physician if line distortions or scotomas are detected and persist for one or two days.’
    dizziness, light-headedness, loss of balance, loss of equilibrium, spinning of the head, swimming of the head
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Origin

Mid 16th century (denoting dizziness and dim vision): via late Latin from Greek skotōma, from skotoun ‘darken’, from skotos ‘darkness’.

Pronunciation

scotoma

/skəˈtōmə//skəˈtoʊmə/