The Impact of Dark Adaptation on Photoscreening

摘要: Abstract Purpose: Some previous studies have used different dark adaptation periods to achieve adequate pupil dilation for photo refraction. Because efficient use of time is important in screening programs, we investigated how affects the quality eye photographs. Methods: This prospective study was done on 2 groups. In first group (40 patients), 1 horizontal flash and vertical photograph were taken as soon room lights turned off, a second set photographs after 10 minutes adaptation. (37 sets 1, 5, 15 Pupillary diameters measured by an observer who masked timing The findings compared using Wilcoxon signed rank test Student t paired data. Results: Compared with results at minute, mean pupillary diameter significantly decreased adaptation, both (Z = -4.723; P Conclusion: indicated that not prerequisite photoscreening, that, fact, it might adverse effect diameter. (J AAPOS 2002;6:315-8)