Chauhan B C, Drance S M, Lai C
Department of Ophthalmology, University of British Columbia, Vancouver, Canada.
Graefes Arch Clin Exp Ophthalmol. 1989;227(3):216-20. doi: 10.1007/BF02172752.
Cluster analysis in perimetry is a technique used in the evaluation of localised visual field loss. It has previously been applied to suprathreshold data and, unlike the indices currently available to indicate localised loss, it is influenced by the relative positions of individual defects. This paper describes a cluster analysis for use with data from Program 31 of the Octopus perimeter. To demonstrate the technique, sensitivity values of normal 60-year-old subject were altered to simulate localised loss. Illustrative examples of clinical cases are given, showing differing degrees of localised loss that do not influence the corrected loss variance (CLV) but influence the computed cluster parameters. It is hoped that the value of this form of analysis will be demonstrated in clinical follow-up of glaucoma patients.
视野检查中的聚类分析是一种用于评估局部视野缺损的技术。它此前已应用于超阈值数据，并且与目前用于指示局部缺损的指标不同，它受个体缺损相对位置的影响。本文描述了一种用于分析章鱼视野计程序31数据的聚类分析方法。为演示该技术，对正常60岁受试者的敏感度值进行了改变以模拟局部缺损。给出了临床病例的示例，显示了不同程度的局部缺损，这些缺损不影响校正后的缺损方差（CLV），但会影响计算出的聚类参数。希望这种分析形式的价值能在青光眼患者的临床随访中得到体现。
