一般而言,近视可分为单纯性近视和高度近视两类。单纯性近视是指屈光度在600度以下者,有的伴有散光,但眼部无其他器质性病变,配戴合适的眼镜可以将视力矫正。青少年学生近视大多属于此类。高度近视往往在人的儿童时期或青少年时期发病,病情发展较快,屈光度一般在600度以上,眼底或眼睛其他部位容易产生病变,即使戴上眼镜也很难把视力 In general, myopia can be divided into two types of simple myopia and high myopia. Simple myopia is less than 600 degrees of refraction, and some accompanied by astigmatism, but no other organic eye lesions, wearing appropriate glasses can correct vision. Most young students myopia belong to this category. High myopia often in childhood or adolescence onset, the rapid progression of the disease, refraction generally above 600 degrees, prone to retinal or other parts of the eye lesions, even if it is difficult to put on glasses, vision