眼睛尽力用这个反馈系统，达到理想的视力长度，不是远视也不是近视，这个状态就称正常视力。
This feedback system is used by the eye in an effort to attain an ideal eye length, neither farsighted nor nearsighted. This state is called emmetropia.
如果你的烦恼是远视力而不是近视力，就把这个方法用到远处的文字上。
If your trouble is with distant instead of near vision, use the same method with distant letters.
结论红点黄本对城市小学生的远视力有保护作用。
Conclusion Yellow paper with red dots have good impacts on urban pupils' DV protection.
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