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一、检查了淮北部份地区县城中学及农村中学高中1—3年级在读生3000名,有40.5%因屈光不正视力下降。其中女生有435%、男生有38.3%视力下降。县城中学
First, examinations of some districts in Huaibei County Middle School and rural middle school high school students in grade 1 to 3 3000, 40.5% due to refractive error decreased. Among them 435% of girls, 38.3% of boys have decreased vision. County middle school