TY - BOOK AU - Olaa Ali Ahmed Aqabat AU - Ahmed Shalaby , AU - Mohamed Hosny , AU - Samia Sabry , TI - Evaluation of corneal hysteresis after penetrating keratoplasty for keratoconus patien's : : A case control study / PY - 2013/// CY - Cairo : PB - Olaa Ali Ahmed Aqabat , KW - Hysteresis KW - Keratoconus KW - Keratoplasty N1 - Thesis (M.Sc.) - Cairo University - Faculty of Medicine - Department of Ophthalmology; Issued also as CD N2 - Purpose: To evaluate corneal biomechanics with the ocuular response analyzer (ORA; Reichert Ophthalmic Instrument, Depew, NY) after penetrating keratoplasy for keratoconus patients and to compare results with the biomechanical characteristics of normal eyes ER -