PURPOSE: The purpose of this study was to evaluate prevalence of keratoconus among candidates of refractive surgery in upper Egypt . SETTING: Sohag university hospital and Future center (a private center) for LASIK and refractive surgery in Sohag governorate, Egypt. DESIGN: Observational cross-sectional study. PATIENTS AND METHODS: refractive surgery candidates referred for preoperative evaluation before laser in-situ keratomiliusis (Lasik), photorefractive ...
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