Changes in scotopic visibility thresholds with age.
Changes in scotopic visibility thresholds with age.
复制标题
暗视可见度阈值随年龄的变化。
DOI：
10.1001/archopht.1963.00960040010003
复制
发表时间：
1963
影响因子：
--
通讯作者：
P. Gouras
中科院分区：
文献类型：
--
作者：
R. Gunkel;P. Gouras
尽管许多研究表明暗视视力随着年龄的增长而下降，1但尚不清楚不同因素在这一衰老过程中所占的比例。屈光介质的吸收、散射和反射率的变化，以及瞳孔孔径和更中央的视觉通路的变化都可能在不同程度上涉及。在黑暗中瞳孔扩张确实随着年龄的增长而减少2，并且对暗视视觉有可检测的影响。1已经证明，在活体中，人类透镜的transmittance会发生衰老变化3，并且必然对暗视视觉有独立于瞳孔大小的影响。以相对独立于其他老化因素的方式研究透镜衰老对暗适应阈值的影响被认为是有意义的。这是通过比较不同年龄的正常和无晶状体观察者的暗视阈值来实现的。
Although it has been shown in a number of studies that scotopic vision decreases with age,1it is not clear to what proportion different factors contribute to this aging process. Changes in absorption, scatter, and reflectivity of the dioptric media, as well as changes in the pupillary aperture and more central visual pathways may all be involved to varying degrees. Pupillary dilatation in darkness does diminish with age2and has detectable effects on scotopic vision.1Senescent changes in the transmissivity of the human lens in vivo have been shown to occur3and must have effects on scotopic visibility independent of pupil size. It was considered of interest to study the effects of lens senescence on dark-adapted thresholds in a manner that was relatively independent of other aging factors. This was achieved by comparing the scotopic thresholds of normal and aphakic observers of various ages to different