Eisner A, Fleming S A, Klein M L, Mauldin W M
Neurological Sciences Institute, Good Samaritan Hospital and Medical Center, Portland 97209.
Invest Ophthalmol Vis Sci. 1987 Nov;28(11):1824-31.
We measured several indices of foveal visual function for a large group of people aged 60 and older. The data reported in this paper are from individuals who had good acuity in each eye and met a number of other criteria for good ocular health. For each index, we described the rate of cross-sectional change with age using linear regression statistics. We found age-related change for eyes having 20/20 or better acuity to exist for several different indices. Sensitivity mediated by the blue-sensitive cones decreased with age, as expected. However, the rate of decrease was faster for females than for males. At least part of the difference was associated with different rates of lenticular change. Absolute sensitivity at long wavelengths also decreased with age, but at the same rate for each sex. Rayleigh color matches changed with age in a manner consistent with underlying age-related decreases of effective foveal cone photopigment density. However, not all indices showed age-dependent changes. For instance, the time constant describing the rate of photopic dark adaptation did not appear to change with age.
我们对一大群60岁及以上的人测量了中央凹视觉功能的几个指标。本文报告的数据来自每只眼睛视力良好且符合多项其他眼部健康良好标准的个体。对于每个指标，我们使用线性回归统计描述了随年龄的横断面变化率。我们发现，对于几种不同的指标，视力为20/20或更好的眼睛存在与年龄相关的变化。正如预期的那样，由蓝敏视锥细胞介导的敏感度随年龄下降。然而，女性的下降速度比男性快。至少部分差异与晶状体变化的不同速率有关。长波长处的绝对敏感度也随年龄下降，但男女下降速率相同。瑞利颜色匹配随年龄变化，其方式与中央凹视锥细胞有效光色素密度潜在的与年龄相关的下降一致。然而，并非所有指标都显示出与年龄相关的变化。例如，描述明适应暗适应速率的时间常数似乎不会随年龄变化。
