铁石学校是我县地处边远、少数民族学生较多、经济较落后的一所学校。全校共有学生852名,其中汉族学生为562名(占66%),少数民族学生为290名(占34%)。1988年我们按照全国学生体质、健康状况调查方案,调查了该校学生沙眼患病情况,结果列表如下,两族差异显著,少数民族沙眼患病率高于汉族。(表1) Ironstone School is located in the remote county, minority students more, more economically backward a school. The school has a total of 852 students, of which 562 Han students (66%), 290 minority students (34%). In 1988, we investigated the prevalence of trachoma in our school according to the survey plan of students’ physique and health in our country. The results are listed as follows. There are significant differences between the two ethnic groups. The prevalence of trachoma in minority nationalities is higher than that of Han nationality. (Table 1)