Abstract

Perimetry is one of the most important diagnostic procedures for monitoring the status of glaucoma and other ocular disorders. A number of studies (e.g., Werner and Drance, 1977; Flammer et. al., 1984) have reported that glaucoma patients and suspects demonstrate greater response variability than normal control subjects. While some investigators (Werner and Drance, 1977; Flammer et. al., 1984) have proposed that this increased variability is due to pathophysiologic changes to optic nerve fibers, other investigators (Henson and Bryce, 1991; Demirel and Vingrys, 1993, 1994; Vingrys and Demirel, 1993) have proposed that the increased variability is due to eye movements interacting with steep gradients in visual field sensitivity. In this view, eye movements act as a low pass spatial filter for steep sensitivity gradients as well as introducing variation in the position of scotoma boundaries, thereby increasing response variability.

© 1995 Optical Society of America