This paper suggested that continual and short-distance use of eyes for long time and narrow environment visual field were the main reasons for the abnormal vision.

本文认为近距离用眼持续时间过长及环境视域小等是引起视力不良的主要原因。

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This paper suggested that continual and short-distance use of eyes for long time and narrow environment visual field were the main reasons for the abnormal vision.

本文认为近距离用眼持续时间过长及环境视域小等是引起视力不良的主要原因。

youdao