She suffered from short sight.

她眼睛近视。

《牛津词典》

And short sight may caused by it for your eyes stay tense.

眼睛长期处于紧张状态容易造成近视。

youdao

Short sight comes about because the eye ball grows too big and fails to focus light properly.

近视的产生，是因为眼球长得过大，无法正常地集中光线。

youdao

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