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人在20岁左右时的视力(包括戴眼镜时的矫正视力)是一生中最敏锐的时期。过了45岁以后视力开始呈逐渐下降趋势。有调查显示,60岁以上老年人每增长10岁,视力平均下降0.2左右,盲和低视力的人群中70%左右是老年人。这说明老年人的视力普遍低于其他年龄人群。老年人的视力减退有的是
Visions at the age of 20 (including corrected vision when wearing glasses) are the most acute periods in life. After 45 years of age began to show a gradual decline in visual acuity. A survey shows that for every 10-year-old older than 60 years old, vision decreased by about 0.2, about 70% of the blind and low-vision people are the elderly. This shows that the elderly generally have lower vision than other age groups. The elderly have some vision loss