准分子激光治疗性角膜切削术在角膜浅层病变中的应用

准分子激光治疗性角膜切削术(phototherapeutic keratectomy,PTK)利用准分子激光切除病变组织,切削表面规则而光滑,且不损伤周围健康组织,具有精确度高、安全性好、操作简便、不良反应小等诸多优点,已广泛应用于角膜变性、角膜营养不良、大泡性角膜病变、复发性糜烂等角膜浅层病变的治疗,能够有效提高视力,缓解症状,可延迟或部分替代角膜移植术,具有良好的应用前景.严格掌握PTK的适应证,了解其局限性,针对不同病变特点采取相应手术技巧,发挥其独特的优势,是获得满意疗效、提高患者生活质量的关键.

Application of phototherapeutic keratectomy on superficial corneal diseases

Phototherapeutic keratectomy (PTK) use excimer laser to ablate lesions,gaining a regular and smooth corneal surface without damaging surrounding healthy tissue.PTK has many advantages such as high precision,good security,easy to manipulate and little adverse effects.Now it is widely applied in many superficial corneal diseases,such as corneal degeneration,corneal dystrophy,bullous keratopathy,recurrent corneal erosion etc.PTK is an effective treatment method to improve vision and relieve symptoms in superficial corneal diseases,and it is often successful in delaying or avoiding keratoplasty.In order to obtain satisfied efficacy and improve the quality of life,the indications and limitations of PTK should be mastered strictly,and different surgical skills should be used for different pathologic features.