所有眼在休息状态下平行光线不能在视网膜成焦点者称为非正视眼（ampetopia）或屈光不正（errors of refraction） 回复: 屈光不正分为远视眼、近视眼、和散光眼三种。在矫正视力的同时，可给予针灸、中药治疗，可获得较好的效果。
双语例句
1
This paper proposes a formula fitting method for realtime correction of radio wave refractionerrors for fast determination of the refraction error and improvement of radio instrumentation accuracy.
It has been shown by studying the radar echo top heights that the abnormal refractionof the atmosphere can cause obvious errors in the radar measurements of height.
研究天气雷达测定回波顶高的几种误差表明：大气异常折射会引起回波顶高明显误差。
3
The influence of the side-refraction in desert regions on the absolute terms of the azimuth conditions and base-line conditions of triangulation chains is expressed as systematic errors.