为了解本市中小学生视力情况,为开展近视眼的防治提供依据,对市区21551名学生进行了专题视力状况调查,现将调查结果分析报告如下。1　调查方法采用统一的灯箱对数视力表,测定方法按《全国学生体质健康调查研究工作手册》执行。裸眼视力≥50为正常,50者为视力低下,并将视力低下 In order to understand the situation of primary and secondary students in the city of vision, to provide a basis for the prevention and treatment of myopia, 21551 students in urban areas conducted a special case of visual acuity, the survey results are now reported as follows. A survey method using a uniform light box logarithmic visual acuity chart, measurement methods according to the “National Student Physical Health Survey Research Handbook” implementation. Uncorrected visual acuity ≥ 50 for the normal, 50 were low vision, and vision loss