It occurs when the eye cannot clearly focus the images from the outside world. The result of refractiveerrors is blurred vision, which is sometimes so severe that it causes visual impairment.
Refractiveerrors cannot be prevented, but they can be diagnosed by an eye examination and treated with corrective glasses, contact lenses or refractive surgery.
屈光不正无法预防,但可通过验光作出诊断,并可选择眼镜、隐形眼镜或手术加以矫正。
3
Uncorrected refractiveerrors (myopia, hyperopia or astigmatism), 43 %.