1. (ophthalmology) eyesight abnormality resulting from the eye's faulty refractive ability. 
   由于眼睛的折射有问题而导致眼光异常。
2. An eye abnormality, such as nearsightedness, farsightedness, or astigmatism, resulting from faulty refractive ability of the eye. 
   屈光不正因眼的折射力缺陷造成的一种不正常的情况，如近视、远视或散光
3. measurement of refractive index 
   折射率测量
4. radio-wave refractive index of air 
   无线电波的空气折射率
5. Relating to optical refraction; refractive. 
   折射的同光学折射相关的；折射

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