The ill habit of using eyes, the long reading-time and other acquired factors are the main reasons of the rising trend of myopia. The hereditary factor gets the important position in myopia.
不良用眼习惯、长时间阅读等后天因素是近视眼发病率随年级逐渐增高的重要原因，遗传因素在近视眼的发病中仍占有重要的地位。
The ill habit of using eyes, the long reading-time and other acquired factors are the main reasons of the rising trend of myopia. The hereditary factor gets the important position in myopia.
不良用眼习惯、长时间阅读等后天因素是近视眼发病率随年级逐渐增高的重要原因，遗传因素在近视眼的发病中仍占有重要的地位。
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