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学生近视眼近年来发展很快、国外也有学生近视眼随教育发展而增长的许多实例。多数科学家认为与学生作业负担过重、近距离用眼时间过长有关。为了证实这种病因,1914年Levinsohn把猴固定在看地板的姿势,每天几小时坚持几个月。1961年Young用头罩限制猴视距每天几小时、持续一年等实验,造成了近视眼。为探索在动物发育期间长期限制视距,并使其注意分辨近事物对眼球发育的影响,我们用鸡做了如下实验:
Students in recent years the rapid development of myopia, foreign students also have myopia with the development of education and many examples of growth. Most scientists think that they are overburdened with students’ work and are closely related to the time spent in the eyes. To confirm this etiology, Levinsohn immobilized the monkey in a floor-looking posture in 1914 for a few hours a day for a few months. In 1961, Young used a headgear to limit monkey sight distance several hours a day for a year and other experiments, resulting in myopia. In order to explore the long-term limitation of line-of-sight during animal development and make it pay attention to distinguish the influence of near-objects on the development of the eyeball, we used the following experiment of chicken: