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Corneal sensation 1 year after small incision lenticule extraction SMILE compared to previous LASIK studies

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Session Details

Session Title: SMILE for Myopia I

Session Date/Time: Sunday 14/09/2014 | 08:00-09:30

Paper Time: 08:54

Venue: Capital Hall B

First Author: : E.Bartoli ITALY

Co Author(s): :    D. Reinstein   M. Gobbe   T. Archer        

Abstract Details


To longitudinally evaluate the recovery of central corneal sensation after small incision lenticule extraction (SMILE) and compare this to data from published studies after LASIK


London Vision Clinic, London UK


A retrospective non-comparative case series included 158 consecutive myopic eyes (81 patients) treated with SMILE using the VisuMax femtosecond laser. Central corneal sensation was measured using a Cochet-Bonnet aesthesiometer before and 1 day, 1 week, 1, 3, 6, and 12 months postoperatively. Baseline was defined as 5mm less than the preoperative value. A literature search was performed to find published studies reporting central corneal sensation using a Cochet-Bonnet aesthesiometer before and after LASIK. These data were averaged and used as a comparison


Mean spherical equivalent refraction treated was -6.56±2.74D (range: -2.25 to -13.00D). Median age was 33 years (range: 19 to 66 years). After SMILE, central corneal sensation dropped from 54-mm preoperatively to 32-mm (day one), rising to 40-mm (1 week), 44-mm (1 month), 49-mm (3 months), 54-mm (6 months), and 55-mm (12 months). Corneal sensation had reached baseline by 1, 3, 6, and 12 months in 62%, 76%, 89%, and 90% of eyes respectively. Twenty LASIK studies were identified; central corneal sensation dropped from 56-mm preoperatively to 9-mm (day one), rising to 15-mm (1 week), 22-mm (1 month), 33-mm (3 months), 44-mm (6 months), and 50-mm (12 months). Across the LASIK studies, mean spherical equivalent refraction treated was -4.30D and mean age was 34.2 years


There was less reduction in central corneal sensation after SMILE than after LASIK at all time points and recovery to normal levels was reached in the majority of patients by 3 months after SMILE compared with 6-12 months after LASIK

Financial Interest:

One or more of the authors... receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented

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