Elliott D, Whitaker D, MacVeigh D
Department of Vision Sciences, Aston University, Birmingham, U.K.
Vision Res. 1990;30(4):541-7. doi: 10.1016/0042-6989(90)90066-t.
Contrast sensitivity thresholds were measured over a range of spatial and temporal frequencies in both a group of young and older observers. Results demonstrate a significant reduction in contrast sensitivity of the older age group at all but the lowest combinations of spatial and temporal frequencies investigated. The senile miosis and reduced optical transmission of the older eye was then mimicked using the younger observers as subjects. This combined effect of reducing retinal illumination produced no significant change in sensitivity. These findings are discussed in terms of neural loss within the visual pathways with increasing age.
在一组年轻和年长的观察者中，测量了一系列空间和时间频率下的对比敏感度阈值。结果表明，在除所研究的最低空间和时间频率组合之外的所有情况下，老年组的对比敏感度均显著降低。然后，以年轻观察者为对象，模拟老年眼睛的瞳孔缩小和光学传输降低的情况。视网膜照明减少的这种综合效应并未使敏感度产生显著变化。根据视觉通路中随着年龄增长而出现的神经损失对这些发现进行了讨论。
