Spatial vision and aging. I: Contrast sensitivity.
Spatial vision and aging. I: Contrast sensitivity.
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空间视觉与衰老。
DOI：
10.1093/geronj/35.5.692
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发表时间：
1980
期刊：
影响因子：
--
通讯作者：
Hutman,LP
中科院分区：
文献类型：
--
作者：
Sekuler,R;Hutman,LP
对比敏感度功能（CSF）测量两组健康的观察者，一个年轻组的平均年龄为18.5岁，一个老年组的平均年龄为73岁。虽然这两组人对高空间频率（窄条光栅）的敏感性几乎相同，但年轻的观察者对低和中间空间频率（宽条光栅）的敏感性是老年观察者的三倍。各组对光栅以0.33和6 Hz两种速率闪烁的相对灵敏度没有差异。老年观察者对低空间频率的敏感性降低不能用光学因素或眼部病理学的结果来解释;它可能反映了负责检测低空间频率、时间瞬变目标的视觉子系统的损失。
Contrast sensitivity functions (CSFs) were measured for two groups of healthy observers, a younger group with mean age 18.5 years and an older group with mean age 73 years. Although the two groups had virtually identical sensitivities to high spatial frequencies (gratings with narrow bars), the younger observers were three times more sensitive at low and intermediate spatial frequencies (gratings with wider bars) than were the older observers. Groups did not differ in relative sensitivity to gratings flickered at two rates, .33 and 6 Hz. The reduced sensitivity of older observers to low spatial frequencies cannot be explained in terms of optical factors or as the result of ocular pathology; it probably reflects a loss in that visual sub-system responsible for detecting low spatial frequency, temporally transient targets.