A REFLECTOMETRIC TECHNIQUE FOR ASSESSING PHOTORECEPTOR ALIGNMENT
A REFLECTOMETRIC TECHNIQUE FOR ASSESSING PHOTORECEPTOR ALIGNMENT
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DOI：
10.1016/0042-6989(94)00203-x
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发表时间：
1995-04-01
期刊：
影响因子：
1.8
通讯作者：
DELORI, F
中科院分区：
文献类型：
--
作者：
GORRAND, JM;DELORI, F
光感受器定向的临床研究受到这样一个事实的限制，即用于测量Stiles-Crawford效应的心理物理方法是耗时的，并且需要受试者的良好合作。我们已经开发了一种新的仪器，感光体对准反射计（PAR），确定感光体对准通过测量由一个视网膜位置反射的光在瞳孔中的分布。该确定在4秒的测量时间内完成，并且需要受试者的最小合作。该技术不受限制膜处的反射、或入射光瞳和出射光瞳配置的变化、或漂白光进入的位置的显著影响。应用PAR测量了20例20 ~ 60岁正常人的视网膜中央凹光感受器的方向性、方向性及方向性光通量与弥散性光通量的比值。
Clinical studies of photoreceptor orientation are limited by the fact that psychophysical methods for measuring the Stiles-Crawford effect are time consuming and require excellent co-operation from the subject. We have developed a novel instrument, the photoreceptor alignment reflectometer (PAR), that determines photoreceptor alignment by measuring the distribution in the pupil of light reflected by one retinal location. This determination is accomplished in a measurement time of 4 sec and requires minimal co-operation from the subject. The technique is not significantly affected by reflections at the limiting membrane, or by changes in entrance and exit pupil configuration, or by location of bleaching light entry. The PAR was used to measure the orientation of foveal photoreceptors, their directionality, and the ratio of directional to diffuse flux in 20 normal subjects ranging in age from 20 to 60 yr.