Optic disc evaluation versus the visual field in chronic glaucoma.

A classification of the optic disc (the upper and lower half treated separately) was performed independently by 3 observers. The material consisted of 40 single colour photographs of eyes with glaucomatous field defects and of fellow eyes. The consistency between the observers was found to be good. The sensitivity for the detection of visual field defects from the appearance of the corresponding disc half was 75%. The specificity was 85%.