利用准分子激光可以在微米水平切削角膜组织 ,且对邻近组织几乎无损伤这一特性治疗角膜浅层病变的方法 ,称为准分子激光治疗性角膜切削术 (phototherapeutickeratectom y,PTK)。本文就 PTK有关适应证、作用机理、病理、技术参数及并发症等最新状况作一综述。1　适应证1.1　角膜 The use of excimer laser cutting corneal tissue at the micron level, and almost no damage to the adjacent tissue characteristics of the treatment of shallow corneal lesions method, known as the excimer laser photocoyalctomy (phototherapeutic focusctom y, PTK). This article reviews PTK indications, mechanism of action, pathology, technical parameters and complications of the latest situation. 1 indication 1.1 Cornea