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为了解中小学生考试前后因学习负担对视力的影响,我们对部分学生考试(期末考)前后及寒假后进行3次视力检查及有关因素的调查。现将调查结果报告如下:1 调查对象和方法1.1 对象 选郯城县县城和乡镇各四所中小学,剔除患眼病和智力缺陷的学生,考试前检查中小学生2472人,考试后及寒假后检查1942人,其中男生990人,女生952人。本次调查一律以
In order to understand the impact of learning burden on students' eyesight before and after the examinations for primary and middle school students, we conducted a survey of 3 eyesight examinations and related factors before and after some exams (final exams) and after winter breaks. Now the survey results are reported as follows: 1 survey and methods 1.1 target selected county and townships in each of the four primary and secondary schools, excluding eyes and mental retardation of students, examinations before the examination of primary and secondary school students 2472, examinations and post-winter check 1942 Among them, there are 990 boys and 952 girls. The survey will be