结论：RK、PRK、LASIK术后视力低下的主要原因是医源性圆锥角膜和高度近视、高度散光。

Conclusions:Iatrogenic keratoconus, high myopia and high astigmatism are the major cause of vision lowering after RK, PRK LASIK.

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圆锥角膜是一种先天性发育异常，是一种以角膜扩张为特征，致角膜中央部向前凸出、变薄呈圆锥并产生高度不规则散光的角膜病变。

Keratoconus is an uncommon autosomal recessive inheritance, characteristic of corneal ectasia, which results in the corneal central anterior bulging, conus formation and high irregular astigmatism.

youdao

圆锥角膜是一种先天性发育异常，是一种以角膜扩张为特征，致角膜中央部向前凸出、变薄呈圆锥并产生高度不规则散光的角膜病变。

Keratoconus is an uncommon autosomal recessive inheritance, characteristic of corneal ectasia, which results in the corneal central anterior bulging, conus formation and high irregular astigmatism.

youdao