Preoperative corneal sensation as measured by mean Cochet-Bonnet aethesiometry was equal between the inverted and conventional side cut groups but was better in eyes with an inverted side cut compared with a conventional side cut at all postoperative months ( inverted vs. conventional : 1 month , 14.5 vs. 13.2 mm ; 3 months , 24.9 vs. 18.4 mm ; 6 months , 51.2 vs. 42.6 mm ; 12 months , 59.8 vs. 58.3 mm ; all P 0.02 ) .