Characteristics of frequency-of-seeing curves for a motion stimulus in glaucoma eyes, glaucoma suspect eyes, and normal eyes

This study compared frequency-of-seeing curves for a line displacement test in glaucoma patients and normals. Probit analysis of the frequency-of-seei ng curves provided the motion thresholds and the slopes of the frequency-of -seeing curves, represented by the interquartile range. The thresholds and interquartile ranges were significantly elevated in the glaucoma eyes and s uspect eyes, compared to controls. A logistic regression model incorporatin g both the interquartile range and threshold significantly improved the sen sitivity of the motion test in the suspects. Abnormal shallowing of the slo pe of the motion frequency-of-seeing curve may represent one of the earlies t changes in glaucoma. (C) 1998 Elsevier Science Ltd. All rights reserved.