Confidence intervals for change in automated visual fields

摘要: Three successive fields of 136 eyes (86 patients) were extracted from our data base containing over 3000 visual performed on the Humphrey field analyser with program 30-2. Series in which second was depressed relative to first selected for analysis determine how much change between two required predict a downward trend as confirmed by third series. The stratified respect initial damage. Seven regions analysed including upper and lower temporal nasal quadrants, superior inferior Bjerrum regions, whole field. Minimally damaged 4.7 5.6 dB mean sensitivity, whereas more 5.5 7.2 sensitivity have 95% confidence that negative would be region most sensitive detection change, least sensitive. We conclude this series large changes are sure due disease rather than chance fluctuation. Where any doubt exists, should repeated confirm reality change.