TY - BOOK AU - Iyad Adnan Salem Goussous AU - Ahmed Reda Awadein, AU - Mohamed Sameh Elagha , AU - Mostafa Mostafa Bahgat , TI - Changes in corneal hysteresis after excimer laser surgery for myopia : : Surface ablation versus laser in - situ keratomileusis / PY - 2013/// CY - Cairo : PB - Iyad Adnan Salem Goussous , KW - Analysis of variance KW - Keratocnus KW - Mitomycin C N1 - Thesis (M.Sc.) - Cairo University - Faculty of Medicine - Department of Ophthalmology; Issued also as CD N2 - Corneal refractive surgery is the most performed ophthalmic procedure in the world . Despite the huge leaps in advancing this technology to reduce the riske of intraoperative and postoperative complications there is still a very small risk to develop sight threatening complication such as cornea ectasia . Two surgical techniques laser assisted in situ keratomileusis and photorefractive keratectomy have been used to correct myopia ER -