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为了进一步为保护视力工作提供依据,在太原市双塔西街小学党支部、工宣队的领导和班主任老师的大力协助下,我们连续四年对该校原二年级和原三年级各两个班共187名学生(374支眼)的视力变动情况进行了追踪观察。视力检查是在自然光线下(视力表照度在200米烛光以上,无直射阳光)接通常方法进行的。为了了解视力变动的原因,对该校学生的作息时间、学习负担、体育活动开展情况
In order to further provide evidence for the work of protecting eyesight, with the great assistance of leaders of Party Committee of Primary School and Team leader of Twin Towers West Street in Taiyuan City and two class teachers A total of 187 students (374 eyes) of the visual changes were followed up. Visual acuity tests are performed under natural light (visual acuity of 200 meters above the candle, no direct sunlight). In order to understand the reasons for the change of vision, the students of the school schedule, learning burden, sports activities carried out