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１９９１～１９９５年对兰州市大学招生体检中的４８０９０名学生的视力低下状况进行了调查，并对８项专业招生受限的原因进行了统计分析。其结果，占专业受限原因第一位的是视力低下。在５年的调查分析中发现，视力低下所占比例有逐年上升趋势，１９９１～１９９５年分别为６３．２６％、６５．７６％、６６．８１％、６６．０３％、６８．５１％；视力低下率还有显著的性别和城乡差异（Ｐ＜０．００１），女生视力低下率为７２．０６％，男生视力低下率为６１．４１％；城市学生的视力低下率为７４．２５％，农村学生的视力低下率为５０．９８％。
From 1991 to 1995, the under-vision of 48090 students in LanZhou University admissions medical examination was investigated and the reasons for the limited enrollment of 8 majors were analyzed. As a result, accounting for the first reason for professional constraints is poor eyesight. During the five years’ investigation and analysis, the proportion of low vision has been increasing year by year, from 63.26%, 65.76%, 66.81%, 66.03% and 68.51% respectively from 1991 to 1995; There was also a significant gender and urban-rural difference (P <0.001) in the prevalence of poor eyesight (72.06% for girls, 61.41% for boys and 74.25% for urban students) , Rural students’ vision loss rate was 50.98%.