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对山区县城乡小学生322人进行了连续五年的视力及眼屈光度动态观察。采用国际标准视力表于每年3月和9月各查一次视力。对远视力<1.0者用排镜检查屈光度,凡远视力不能矫正到1.0以上者,不列入统计。
A total of 322 primary and secondary school students in urban and rural areas of mountainous areas were assessed for visual acuity and diopter dynamic observation for five consecutive years. The use of international standard eye chart in March and September of each inspection of vision. For distance vision <1.0 with dioptric examination of diopter, where the distance vision can not be corrected to more than 1.0, are not included in the statistics.