Optic disc observations in glaucoma.

Abstract

In glaucomatous eyes, contrary to normal eyes, the blind spot size is not correlated with the disc or cup size, and the size of the optic disc, cup and optic rim also varies. The variation in area of the glaucomatous optic disc correlates with variation in area of the optic cup. The rim width and total rim area in glaucomatous eyes are decreased. In glaucoma the upper, lower and nasal rim widths are about the same, whereas the smallest rim width occurs temporally. Thus, clinically cupping in glaucoma eyes need not be vertically oval.