Gao Y, Zuo K M
Zhonghua Yan Ke Za Zhi. 1989 May;25(3):130-4.
The visual acuity, refraction and related factors in 471 eyes 60-90 years of age were analyzed with the authors's statistical method for refractive data. The mean logarithmic visual acuity (Lv) of all eyes naked was 4.66 (equivalent to 20/44, or 6/13), and with corrections 5.03 (equivalent to 20/18.7, or 6/5.6). There was significant negative linear correlation between Lv and age (r = -0.9684), Lv = 5.7183-0.0095 x age. The percentages of hyperopia and myopia in the series were 47.8% and 39.7%, the mean refraction being +0.96 DS +0.78 DC and -1.29 DS -0.95 DC respectively. The percentage of mixed astigmatism was 7.86%, averaging +0.71 DC -0.74 DC. The mean refraction of all the patients was -0.05 +/- 2.90 DS -0.04 +/- 1.14 DC.
采用作者的屈光数据统计方法，对471只年龄在60至90岁之间的眼睛的视力、屈光及相关因素进行了分析。所有裸眼的平均对数视力（Lv）为4.66（相当于20/44，或6/13），矫正后为5.03（相当于20/18.7，或6/5.6）。Lv与年龄之间存在显著的负线性相关性（r = -0.9684），Lv = 5.7183 - 0.0095×年龄。该组中远视和近视的百分比分别为47.8%和39.7%，平均屈光分别为+0.96DS +0.78DC和 -1.29DS -0.95DC。混合散光的百分比为7.86%，平均为+0.71DC -0.74DC。所有患者的平均屈光为-0.05±2.90DS -0.04±1.14DC。
