cup:disc ratio

cup:disc ra·ti·o

(kŭp disk rā'shē-ō)

The ratio between the diameter of the cupped or depressed central zone of the optic disc and the diameter of the entire disc; normally lower than 1:3, it is increased in glaucoma.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

Mentioned in

cup-disc ratio
glaucoma
glaucomatous cup
grading scale
ocular hypertension
secondary deviation

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