relative afferent pupillary defect
C2CEFR level
98/100Rarity: very rare
TechnicalRegister
A sign, elicited by the swinging-light test, in which the affected pupil dilates rather than constricts, indicating optic nerve or severe retinal disease.
A relative afferent pupillary defect on the swinging-light test supported a diagnosis of optic neuritis.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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