1989年9月,我们对重点中小学和普通中小学在校学生的视力进行了检查,共检查了四所学校(重点小学、重点中学、普通小学和普通中学各一所)3884人,结果见表1。重点中小学生的视力不良率均高于普通中小学生(P均<0.01)。造成差异的原因,笔者认为在影响 In September 1989, we examined the eyesight of school-based students in key primary and secondary schools and ordinary primary and secondary schools and inspected 3,884 people in four schools (key primary schools, key middle schools, ordinary primary schools and ordinary secondary schools). As a result, Table 1. The rate of poor eyesight in primary and secondary school students was higher than that of ordinary primary and middle school students (all P <0.01). The reasons for the differences, I think the impact