ABBREVIATION for photorefractive keratectomy 近视雷射角膜切削术
PRK has become less common in recent years because more eye surgeons prefer the LASIK procedure.
近几年PRK变得不太普遍了，更多的眼科手术喜欢选用术后好预测的LASIK程序。
In general, for correcting nearsightedness over 3 diopters, both LASIK and PRK are better than radial keratotomy (RK).
在一般情况下，对于纠正300度以上的近视来说，LASIK和PRK手术两者均优于RK（径向角膜切开术）手术。
In PRK, the top layer of the cornea, called the epithelium, is scraped away to expose the stromal layer underneat.
光性折射角膜切削术使用的方法是削去角膜的顶层，又称上皮层，来显露下面的基质层。
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