目的了解中学学生视力状况,探讨中学生视近习惯与视力低下的关系。方法用多阶段整群抽样方法,对学生进行屈光测定并对其进行问卷调查。结果武汉市某中学学生视力低下率为63.8%;男生视力低下率为60.4%;女生视力低下率为67.5%。影响视力低下发生的视近习惯有:看书距离、看电视距离、课间活动、连续看书1小时以上。结论看书距离和看电视距离越远是视力低下的保护因素,课间活动少、连续看书1小时以上是视力低下的危险因素。 Objective To understand the visual acuity of middle school students and to explore the relationship between visual acuity and visual acuity of middle school students. Methods A multistage cluster sampling method was used to measure the students’ refraction and conduct a questionnaire survey. Results The low vision rate of a middle school student in Wuhan was 63.8%, the low vision rate of boys was 60.4%, and the low vision rate of girls was 67.5%. Affect the visual acuity occurred as nearly customary are: reading distance, watching TV distance, class activities, continuous reading 1 hour or more. Conclusions The longer distance between reading and watching TV is the protective factor of poor eyesight, the less intercourse activity and the continuous reading more than one hour are the risk factors of poor vision.