我们于1986年6月对天水市秦城区1079名中、小学生进行了沙眼患病情况调查,报告如下:一、对象和方法用分层整群随机抽样法,选秦城区中、小学各一所。中学初一、初二、高一、高二各一班;小学1—4年级各二班。7—18岁男女汉族学生。按1979年分 In June 1986, we investigated the prevalence of trachoma in 1079 primary and secondary school students in Qincheng District, Tianshui City. The report is as follows: I. Object and Methods A stratified cluster random sampling method was adopted to select each of primary and secondary schools in Qincheng District . The first day of junior high school, the first two days, the high one, sophomore each class; Primary 1 - 4 grade two classes. 7-18-year-old male and female Han students. By 1979 points