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为了探索中学生视力的变化规律，提高视力保护工作的效果，对我校连续五年视力检测资料进行了分析．1对象和方法1．1对象1981和1982年入校，中学阶段均在D吹学习且初一至高二学年逐年视力险测资料完整的153名学生（男80人，160眼；女73人，146限）为统计对象。初一入学年龄男生
In order to explore the changing rules of visual acuity of middle school students and to improve the effect of visual acuity protection, the visual acuity testing data of our school for five consecutive years were analyzed. 1 Subjects and Methods 1.1 Subjects 1981 and 1982 admitted to secondary school are blowing in D and the first two high school year-end vision assessment of visual data integrity of the 153 students (male 80, 160; female 73, 146 Limit) as a statistical object. Beginning entry age boys