近视力的过度强化和远视力的运动不足是造成大量学生患近视眼病的根本原因。调查显示,城镇学生患病率高于农村学生,女生患病率高于男生。究其原因,农村学生由于上下学时视野开阔,其远视力得到锻炼。而男女生的远近视力的运动也是有区别的,其典型表现为:女生写字较小,用眼距离一般比男生更近,户外运动又比男生少。因而近视力比男生更强化,远视力锻炼不足。从用眼科学来看,用眼太近时眼 Excessive strengthening of near vision and far vision of the lack of exercise is caused by a large number of students the root cause of myopia. Survey shows that the prevalence of urban students than rural students, the prevalence of girls than boys. The reason, rural students due to open field of vision wide open, its far-sighted get exercise. The movement of men and women near and far vision are also different, the typical performance: girls write smaller, with the eyes distance is generally closer than boys, outdoor sports and boys less. Thus, myopia stronger than boys, far-vision exercise is not enough. From the perspective of ophthalmology, when the eye is too close with the eye