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我校自1994年以来连续3年对本校1455名学生进行了现力追踪，现将调查结果分析如下。1调查对象与方法1．1对象本校94级、95级、96级学生1455名，年龄15－22岁。l，2方法由本校校医于学生每年人学时用灯箱或国际标准视力表进行视力检查，凡探眼视力＜5．0者均定为视力低下。2调查
Our school has been tracking the strength of 1455 students of our school for three consecutive years since 1994. The survey results are as follows. A survey of objects and methods 1.1 target 94 school 94, 95, 96 students 1455, aged 15-22 years old. l, 2 method by the school physician in students every year when students use light boxes or international standard visual acuity eye examination, where the eye sight vision <5.0 were set as vision loss. 2 investigation