雷射屈光角膜切削术（Photorefractive keratectomy，缩写 PRK），是一种光剥离手术(photoablation procedure)。因为直接使用雷射照在角膜表面组织使其蒸散挥发掉，而修整过的角膜具较佳对焦效果。但目前此种手术已渐渐较不流行，原因是视力变差的再复发率偏高，造成的因素是覆盖角膜表面的上皮细胞会再生长回去，于是角膜又渐渐变回原状，导致近/远视眼再度出现，回复到手术前的状态。

Photorefractive keratectomy (PRK) and laser-assisted sub-epithelial keratectomy (or laser epithelial keratomileusis) (LASEK) are laser eye surgery procedures intended to correct a person's vision, reducing dependency on glasses or contact lenses. LASEK and PRK permanently change the shape of the anterior central cornea using an excimer laser to ablate (remove by vaporization) a small amount of tissue from the corneal stroma at the front of the eye, just under the corneal epithelium. The outer layer of the cornea is removed prior to the ablation. A computer system tracks the patient's eye position 60 to 4,000 times per second, depending on the brand of laser used, redirecting laser pulses for precise placement. Most modern lasers will automatically center on the patient's visual axis and will pause if the eye moves out of range and then resume ablating at that point after the patient's eye is re-centered.