视力不良是我国中小学生常见病之一。近年来,学生视力不良患病率有逐年增加的趋势[1]。在许多地区,视力不良已成为学生常见病中患病率最高的疾病,严重影响着中小学生的身心健康[2-4]。为此,国家在2007年发布了《中共中央国务院关于加强青少年体育增强青少年体质的意见》,2008年 Poor eyesight is one of the common diseases of primary and secondary school students in our country. In recent years, students’ prevalence of poor eyesight has been increasing year by year [1]. In many areas, poor eyesight has become the most prevalent disease in common diseases among students, seriously affecting the physical and mental health of primary and secondary school students [2-4]. To this end, the state released in 2007 “the CPC Central Committee and State Council on strengthening the sports of young people to enhance their physique advice”, 2008