الفهرس 
INTRODUCTION AND AIM OF THE WORKOnly 14 pages are availabe for public view
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Abstract
Corrective refractive surgeries are most frequently used ophthalmic procedures globally for its safety, efficacy, and quick visual recovery. LASIK is the most commonly performed surgical technique for with an estimated 1.5 million annual procedures performed worldwide. Although outcomes are highly predictable, successful, and satisfactory, intraoperative and/or postoperative complications can occur. While effective means have emerged to manage several LASIK complications, others are still subject to investigation. Post-LASIK ectasia is a visually debilitating complication of an elective refractive procedure Post-LASIK ectasia is structural abnormality of the cornea and is firstly identified with changes in the corneal topography. Patients with KC and other ectatic disorders, specifically with subclinical disease, frequently searching for keratorefractive surgery including LASIK. These cases typically are at very high risk for iatrogenic ectasia development after the surgical procedure. Insight into the risk factors for ectasia after excimer laser to apply strict criteria may help keep these potentially ectatic eyes from undergoing refractive surgery. Detecting the risk of ectasia remains one of the most challenging issues in the evaluation of potential refractive surgery candidates, in part due to the complex interaction of intrinsic (patient) and extrinsic (surgical) risk factors.