S-cone spatial contrast sensitivity can be independent of pre-receptoral factors.
S-cone spatial contrast sensitivity can be independent of pre-receptoral factors.
复制标题
S 锥空间对比敏感度可以独立于感受器前因素。
DOI：
10.1016/0042-6989(96)00047-8
复制
发表时间：
1996
期刊：
影响因子：
1.8
通讯作者：
Swanson,WH
中科院分区：
文献类型：
--
作者：
Swanson,WH
短波长敏感（S-）视锥介导的阈值已被用于研究视力丧失的早期阶段，但由于非神经因素（瞳孔大小、晶状体密度、黄斑色素密度）的影响，S-视锥阈值通常具有有限的临床实用性。目前的研究评估了四种可能的影响，非神经因素对S锥对比敏感度，并显示这些可以通过测量灵敏度为1-5 c/deg与范围的视网膜照度为蓝色测试光栅黄色背景。结果表明，S锥对比敏感度与非神经因素的相关性较好。一个简单的控制实验，描述了在个别患者的独立性进行评估。版权所有© 1996爱思唯尔科技有限公司
Short-wavelength-sensitive (S-) cone-mediated thresholds have been used to study the early stages of visual loss, but due to the effects of non-neural factors (pupil size, lenticular density, macular pigment density) S-cone thresholds are often of limited clinical utility. The current study evaluates four possible effects of non-neural factors on S-cone contrast sensitivity, and shows how these can be minimized by measuring sensitivity for 1–5 c/deg with a range of retinal illuminances for blue test gratings on yellow backgrounds. The data are fit well with a simple four-parameter model which indicates that S-cone contrast sensitivity can be relatively independent of non-neural factors. A simple control experiment is described for evaluating the independence in individual patients. Copyright © 1996 Elsevier Science Ltd.