Effects of Pupil Diameter on Light Detection and Temporal Modulation

被引：0

作者：

Rachel S Li

Andrew W Siu

Johnny C Liyu

Elice C Chan

机构：

[1] The Hong Kong Polytechnic University Kowloon

[2] Department of Optometry and Radiography

[3] Hong Kong SAR

[4] HongKong SAR

[5] Corresponding author. Andrew W Siu

[6] PhD. Department of Optometry and Radiography

[7] China

来源：

眼科学报 | 2003年 / 03期

关键词：

pupil; light detection; temporal modulation; visual sensitivites; hill of vision;

D O I：

暂无

中图分类号：

R77 [眼科学];

学科分类号：

100212 ;

摘要：

Purpose:This study compared the effects of pupil variation on light detection and temporal modulation across the central visual field.Methods:Light detection sensitivity (LDS) and low flickering frequency (6Hz) temporal modulation sensitivity(TMS) of 20 young subjects were measured from the central visual field of the right eyes using an automated perimeter (Medmont M600). The measurements were taken under 3 artificial pupils, i.e. 3mm, 4.3mm and 6mm diameters. The sensitivities were grouped and averaged for different retinal eccentricities(3°, 6°, 10° and 15°).Results:TMS and LDS were reduced with increasing retinal eccentricities (P<0.001) and decreasing pupil diameters(P<0.001). TMS collected from all pupil diameters were significantly different from each other(P<0.001). Similarly, LDS under 3mm pupil was statistically different from those of 4.3mm and 6mm(P<0.003). Comparison of the hills of vision showed that pupil variation resulted in significantly different slopes (P=0.001). The slopes were

引用

页码：137 / 141

页数：5