<原著>中心30°内静的視野測定における視標呈示時間の閾値に及ぼす影響

概要

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The influence of the stimulus duration on the perimetric threshold was studied in normal subjects and early glaucoma patients using Octopus 1-2-3 and its remote software package. A custom program was developed in order to test the influence of various stimulus durations on the perimetric thresholds. First, as preliminary experiments, the differential light sensitivity of the upper nasal profile on the 135 degree meridian was measured in normal subjects using various stimulus durations and target sizes. Studies were then made of the influence of the temporal and spatial summation on perimetric thresholds by analyzing the threshold-duration curves and the threshold-area curves in normal subjects. Secondly, the same test points of Octopus program No. 38 were measured using the stimulus durations of 10,50,100 and 500 msec and the target size 3 in both normal subjects and early glaucoma patients. The use of shorter stimulus duration than the critical time of temporal summation was suggested to provide us with a more sensitive method to detect early glaucomatous visual field defects. A longer stimulus duration might be more helpful than the standard duration in the case of severely damaged visual fields of advanced glaucoma patients.
近畿大学の論文
1994-03-25