Table 1.

Parameters used for patient selection for keratorefractive surgery

Age 18 years or older Patients approaching presbyopic age are informed about the requirement of wearing spectacles for near correction Stable refraction for the previous year or longer Absence of any corneal pathology (keratoconus index [KCI] of the TMS-2 topography system was used for keratoconus screening) - Keratoconus - Keratoconus suspect (forme-fruste keratoconus) - Pellucid marginal degeneration Absence of any other ocular pathology - Herpes keratitis - Corneal dystrophy or degeneration - Lens opacities - Retinal pathology - Glaucoma suspect - Dry eyes Absence of medical contraindications - Diabetes mellitus - Autoimmune disease - Immunocompromised status No pregnancy or lactation LASIK - Myopia of up to -11.00 Diopters (D) - Astigmatism <4.00 Diopters (D) - Hyperopia <4.00 Diopters (D) - Central corneal thickness (CCT) of >480 μm - Presumed residual stromal bed thickness (RSB) of >250 μm PRK - Myopia of up to -5.00 Diopters (D) - Astigmatism <2.00 Diopters (D) - CCT of >450 μm - Remaining corneal thickness >400 µm Written consent after detailed discussion with the patient