一般来说中学生的视力低下,绝大多数为近视.从各地视力普查报告中可以看出,近视的患病率是随着学生年级的升高递增的。近视的发生,与学生的用眼负担有直接的关系.高考复习期间,也是迎考学生们用眼负担较重的时期,因此,视力的保护是一个不应忽视的问题.有些同学复习时间持续过长,眼睛酸胀时仍不休息,使眼睛过于疲劳,引起睫状肌痉挛,视力功能下降,而致近视发生;有些同学看书学 In general, students with low vision, the vast majority of myopia.Can be seen from the census of the report, the prevalence of myopia is increasing with the grade of students. The occurrence of myopia, and the burden on the eyes of students have a direct relationship between the college entrance examination review, but also to welcome students to use the eye burden heavier period, therefore, the protection of eyesight is a problem that should not be ignored.Some students review time continued Too long, sore eyes still do not rest, the eyes are too tired, causing ciliary muscle spasm, decreased visual function, resulting in myopia; some students reading