Sekuler R, Owsley C, Hutman L
Am J Optom Physiol Opt. 1982 Dec;59(12):961-8. doi: 10.1097/00006324-198212000-00005.
The contrast sensitivity function provides a more comprehensive and sensitive measure of spatial vision than does visual acuity. A large-sample study of contrast sensitivity during the adult years revealed that observers over age 60 have a substantial loss of sensitivity to intermediate and high frequencies. All observers wore their best possible optical correction for the test distance and were free from significant ocular pathology. We further report that older observers have difficulty perceiving faces under low contrast conditions, which is predictable from the characteristics of their contrast sensitivity functions.
与视力相比，对比敏感度函数能提供对空间视觉更全面、更敏感的测量。一项针对成年人对比敏感度的大样本研究表明，60岁以上的观察者对中频和高频的敏感度大幅下降。所有观察者在测试距离下都佩戴了最佳的光学矫正眼镜，且没有明显的眼部病变。我们进一步报告称，老年观察者在低对比度条件下难以识别面部，这可从他们对比敏感度函数的特征预测得出。
