title: Four clinical techniques in cup/disc ratio estimation.
abstract: Four clinical techniques for estimating cup/disc ratio were compared. Small differences in magnitude of the cup/disc ratio were found with each technique studied. In addition, a mean cup/disc ratio of between 0.22 and 0.30 was found for the subjects studied. The clinical utility of four funduscopic examination methods is reviewed.
mesh_terms: D005901:Glaucoma / Q000175:diagnosis*; D006801:Humans; D009887:Ophthalmoscopy / Q000379:methods; D009898:Optic Disk; D010781:Photography