Werner E B, Petrig B, Krupin T, Bishop K I
Department of Ophthalmology, Hahnemann University, Philadelphia, PA 19102.
Invest Ophthalmol Vis Sci. 1989 Jun;30(6):1083-9.
The total variability of the visual field was measured in 20 patients with open-angle glaucoma who appeared to be clinically stable and well controlled on medical therapy. All patients had at least four visual fields performed on the Octopus 201 perimeter with at least 12 months follow-up since their first visual field. The four most recently performed visual fields were analyzed. Two different methods for calculating total variability were used. One was based on the variance of the threshold determinations and the other was based on the range. The average total variability per subject was 2.8 decibels (db) using the variance-based calculation and 5.1 db using the range-based calculation. Ninety-five percent of the test locations had a variability of less than 6 db by the variance-based calculation method and 13 db by the range-based calculation method. We discuss the possibility of using this type of data to develop criteria for detection of progressive visual field loss in glaucoma.
对20例开角型青光眼患者的视野总变异性进行了测量，这些患者在临床上似乎病情稳定，且药物治疗控制良好。所有患者在Octopus 201视野计上至少进行了4次视野检查，自首次视野检查以来至少有12个月的随访。分析了最近进行的4次视野检查结果。使用了两种不同的计算总变异性的方法。一种基于阈值测定的方差，另一种基于范围。基于方差的计算方法得出，每个受试者的平均总变异性为2.8分贝（dB），基于范围的计算方法得出为5.1 dB。通过基于方差的计算方法，95%的测试位点变异性小于6 dB，通过基于范围的计算方法为13 dB。我们讨论了使用这类数据制定青光眼进行性视野缺损检测标准的可能性。
