Abstract:

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.