Comprehensive Corneal Evaluation for ICRS Surgery

All patients underwent a complete ophthalmologic examination before ICRS surgery and one and six months after surgery. This examination included determinations of uncorrected distance visual acuity (UDVA) and corrected distance visual acuity (CDVA) on manifest refraction. A Scheimpflug camera with a Placido disc was used to obtain simulated corneal topography, asphericity and corneal aberrometry data. An AS-OCT pachymetry map (16 mm scan diameter, 25 radials, 1024 axial scans) was used to provide an 8 mm diameter scan of total corneal thickness and epithelial thickness mapping data (the central 3 mm zone and 24 peripheral sites in the 3 mm to 8 mm zones centered on the pupillary axis).