单词	keratectomy
释义	keratectomy /ˌkɛrəˈtɛktəmi / noun [mass noun] Surgical removal of a section or layer of the cornea, usually performed using a laser to correct myopia.The report provides information on the safety and effectiveness of four types of refractive eye surgery: radial keratotomy, photorefractive keratectomy, laser in situ keratomileusis and intraocular lenses.... Photo-refractive keratectomy involves treating the surface of the cornea with an Excimer laser which results in flattening of the cornea to correct myopia. Photorefractive keratectomy evolved concurrently with the development of laser technology within refractive surgery.
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