为了解本校初中生视力情况 ,现将 10年来学生视力监测资料进行分析 ,报告如下。1　材料与方法1.1　资料来源　 1990 1998年初中学生视力监测资料。1.2　方法　视力检查 :采用自然光下 ,距离 5ｍ ,用标准对数视力表测得之裸眼视力。判断标准。按刘德华等判断标准 ,凡裸眼视力低 To understand the visual acuity of junior high school students, we will now analyze the student’s vision monitoring data for the past 10 years. The report is as follows. 1 Materials and methods 1.1 Sources of information 1990 and 1998 vision monitoring data for middle school students. 1.2 Methods Visual inspection: using natural light, distance 5m, with the naked eye vision measured by the standard logarithmic vision chart. Judgment criteria. According to Andy Lau et al.