五河县地处淮河下游，城乡经济发展差异较大，一些疾病的患病率也存在城乡差异。为开展学生“六病”防治，我们于1992年至1996年组织体检组对城乡中小学生按眼患病情况进行了调查。1对象与方法对城乡中小学生进行体检，其中沙眼一项由眼科医师检查，按国家有关标准诊断，记录于 Wuhe County is located in the lower reaches of the Huaihe River, urban and rural economic development differences between the prevalence of some diseases there are urban-rural differences. In order to carry out the prevention and treatment of “six diseases” of students, we conducted a survey on the prevalence of eye diseases in primary and secondary schools in urban and rural areas from 1992 to 1996. 1 objects and methods of urban and rural primary and secondary students for physical examination, including trachoma check by an ophthalmologist, according to the relevant state diagnostic standards, recorded in