Play 0:00 HomeInteractive EyeThe Human EyeThe CorneaHow Your Eye WorksRefractive SurgeryWhat Is Refractive Surgery?HistoryRadial Keratotomy (RK)Astigmatic Keratotomy (AK)PRKWho Qualifies for PRK?Patient ExpectationsRisks of PRKLASEKLASIKDifferences Between Lasik and PRKCustom AblationOverview of Phakic LensesThe ProcedureWho Qualifies?RisksCK (Conductive Keratoplasty)Corrective Lenses After Refractive SurgeryCommon Refractive ErrorsRefractive ErrorsMyopia (Nearsightedness)Hyperopia (Farsightedness)AstigmatismPresbyopiaEye TestsEvaluating Refractive ErrorsRefraction AssessmentSlit Lamp ExamVisual Field TestsRetinal ExaminationIntraocular Pressure TestCorneal TopographyCorneal AberrometryResource CenterU.S. Air Force ConsiderationsGlossaryFAQsAtlasReal PatientsREAL PATIENTS: Why Refractive Surgery?REAL PATIENTS: Concerns and ExpectationsREAL PATIENTS: Life After Refractive SurgeryCreditsSearchFeedbackMedical DisclaimerPrivacy PolicyAbout the CEMMContact Us