Visual property of people with low vision (2): contrast sensitivity function

摘要：

In order to establish vision data of low vision to be used for better lighting and signing for them, contrast sensitivity function (CSF) of people with low vision was measured for a number of people who have impaired vision due to various types of pathological disorders in visual pathways. Contrast sensitivity function was measured by presenting a sine wave grating pattern on a CRT display with variable frequency and variable contrast to obtain a threshold point for detection of the grating pattern. It was found that the sensitivity of low vision varied widely from the level of almost near to normal younger people to far lower to that. The sensitivity loss of low vision was prominent at higher frequency region above about 1 cycle per degree (cpd). Consequently the function had a maximum sensitivity at around 0.3 cpd in average. These data suggests that much care should be taken to avoid using high frequency components in designing visual signs for low vision.

关键词： low vision contrast sensitivity function (CSF)

作者: Nana Itoh Ken Sagawa Akira Okamoto Seiji Mitani Toshiaki Yoshida

作者单位: National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba University of Technology National Institute of Technology and Evaluation (NITE)

会议类型: 国际会议

会议名称: 26th Session of the CIE(国际照明委员会（CIE）第26届大会)

会议地点: 北京

会议语种:英文

页码: 133-136

在线出版日期: 2007-07-04（万方平台首次上网日期，不代表论文的发表时间）