DELAY OF PATTERN ELECTRORETINOGRAM PEAKS AND ITS CORRELATION TO CONTRAST THRESHOLD FOR MOTION PERCEPTION IN GLAUCOMA

Peak latencies of pattern electroretinogram (PERG) were compared betwe en glaucomatous eyes and non-glaucomatous eyes. Contrast threshold for motion pecpetion (CTMP) was also measured with a new device in additi on to routine static contrast sensitivity, static visual field and vis ual acuity. In the present recording, configurations for PERG, i.e. lo w reversal rate, low mean luminance and presence of background illumin ation, the PERG peak and trough (P-1 and N-2, respectively) hatencies, were significantly prolonged in the glaucomatous eyes. Although both of the two PERG latencies were strongly correlated with the CTMP, only the P-1 peak latency was strongly correlated with the perimetric indi ces. These results suggest that the P-1 and N-2 latencies reflect diff erent aspects of signal processing in the retina, especially for movin g targets.