我国中小学生视力不良检出率呈逐年上升趋势[1-2]。国内许多研究结果表明,视近活动和不良的用眼习惯是导致视力不良的主要因素[3-4]。本研究通过对郑州市不同年级视力不良学生视力保健行为的比较,为有针对性地在中小学校开展预防近视工作提供参考依据。1对象与方法 1.1对象采用分层整群抽样方法,在郑州市随机选取城市初中、城市小学、乡村初中、乡村小学4类学校每类各2所,且均由1所重点学校和1所普通学校 The incidence of poor eyesight in primary and secondary school students in our country has been increasing year by year [1-2]. Many domestic studies show that as the recent activity and bad eye habits are the main factors leading to poor eyesight [3-4]. In this study, we compared the visual health behaviors of students with poor eyesight in different grades of Zhengzhou with the purpose of providing reference for carrying out prevention of myopia in primary and secondary schools. 1 Subjects and Methods 1.1 Subjects A stratified cluster sampling method was used to randomly select 2 schools of each type in urban junior high schools, urban primary schools, rural junior high schools and rural primary schools in Zhengzhou City and each consisted of 1 key schools and 1 ordinary school SCHOOL