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医学上把近视、远视和散光眼统称为屈光不正或非正视眼,而把两眼的屈光度数不相同称为屈光参差。其发生原因是多方面的。刚出生的婴儿眼为高度远视状态,在发育过程中,远视度数不断减轻,逐渐发育为正视眼。当两眼的发育进展不同时,就能引起屈光参差。另外,有的眼病、外伤、用眼不卫生等也可引起屈光参差。一般情况下,两眼屈光参差不超过300度,双眼均可获得良好的视功能。若大于300度,两眼在视网膜上物像大小很悬殊,这时视力好的一只眼经常应用,另一眼受到
Medical myopia, farsightedness and astigmatism collectively referred to as refractive error or non-eye, and the two eyes of different refractive power is called anisometropia. Its causes are many. Infants born newborn baby is a high degree of hyperopia state, in the development process, the myopia continued to reduce the number gradually evolved into the eye. When the development of the two different eyes, it can cause anisometropia. In addition, some eye diseases, trauma, eye hygiene, etc. can also cause anisometropia. Under normal circumstances, the two eyes anisometropia no more than 300 degrees, both eyes can get a good visual function. If more than 300 degrees, the two eyes in the retina on the size of the object is very poor, then one eye with good eyesight often apply the other eye by