Most recent scientific conclusion is that near sightedness


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送交者: silxirt 于 2010-04-22, 16:09:26:

回答: 西方发明的眼镜传入中国前中国的读书人得深度近视的是否不多? 由 HHS 于 2010-04-22, 15:11:59:

is not caused by near-work, but less out-door activity.

So before glasses was introduced, reading is not the only task that suffers from new-sightedness.




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