| hemianopsia | <neurology, ophthalmology> Blindness for half the field of vision in one or both eyes. Origin: Gr. Opsis = vision (09 Mar 1998) |
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| scintillating scotoma | A localised area of blindness edged by brilliantly coloured shimmering lights (teichopsia); usually a prodromal symptom of migraine. See: fortification spectrum. Synonym: flittering scotoma. (05 Mar 2000) |