ABSTRACT
The staircase threshold perimetry was measured for the 180 degrees-0 degree, 15 degrees, 165 degrees, 195 degrees and 345 degrees meridians of normal subjects and COAG patients. The kinetic quantitative perimetry was also tested in normal subjects with the I1e, I 2 e, I 3 e and I 4 e targets. The results were as follows: (1) The threshold for the 180 degrees-0 degree meridian at 20 degrees in the nasal side was lower than at 20 degrees in the temporal side in normal subjects (P less than 0.001); (2) the physiological blind spot in static threshold perimetry was 5.4 degrees +/- 0.942 degree in normal subjects and 8.09 degrees +/- 1.126 degree in COAG respectively on the horizontal meridian (P less than 0.001); (3) the nasal visual field defects in static threshold perimetry of COAG progressed from the periphery inward; (4) the upper nasal 15 degrees and 165 degrees meridian were more vulnerable than the lower nasal 195 degrees and 345 degrees meridians in COAG patients; (5) the thresholds of 15 degrees, 165 degrees, 195 degrees and 345 degrees meridians in COAG were much higher than those in normal subjects (P less than 0.001); and (6) in kinetic quantitative perimetry, the pseudobaring of physiological blind spot could be detected using the I1e target, with higher frequency in normal subjects over 40 years of age than under 40 years of age (P less than 0.005). The causes of differences in the visual field threshold, the nasal visual field defects, and pseudobaring of physiological blind spot were discussed, with evaluation of their diagnostic significance for COAG.
