Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


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Corneal biomechanical parameters, corneal sensitivity: small-incision lenticule extraction vs femtosecond laser-assisted laser in situ keratomileusis

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Session Details

Session Title: Presented Poster Session: Femtosecond-Assisted Refractive Surgery

Session Date/Time: Saturday 10/09/2016 | 09:30-11:00

Paper Time: 10:40

Venue: Poster Village: Pod 2

First Author: : A.Ghanem EGYPT

Co Author(s): :                  

Abstract Details


To compare the biomechanical properties of the cornea and corneal sensitivity after small-incision lenticule extraction (SMILE group) with those after femtosecond laser–assisted laser in situ keratomileusis (femto-LASIK group)


Corneal biomechanic, Corneal sensitivity, SMILE, Femto-LASIK


A total of 80 eyes and 70 eyes that received SMILE and femto- LASIK procedures, respectively, were enrolled prospectively in this study. Corneal biomechanical properties such as corneal hysteresis (CH), corneal resistance factor (CRF), p1area, and p2 area were quantitatively assessed with the Ocular Response Analyzer. Corneal sensitivity was quantitatively assessed with the Cochet-Bonnet esthesiometry. All eyes assessed preoperatively, 1week, and 1, 3, 6 and 12 months postoperatively


Decrease in CH, CRF, p1area, and p2 area was statistically significant one week postoperatively compared with preoperatively in both groups. Values in the SMILE were significantly higher than those in the femto-LASIK 3 , 6 , 12 months postoperatively . SMILE and femto-LASIK eyes demonstrated impaired central corneal sensitivity ( CCS) and tear-film break up time (TBU) immediately after both procedures. CCS and TBU time values in the SMILE were significantly higher than those in the femto-LASIK 3 months, 6 months, 12 months postoperatively . There were statistically significant correlations between the changes of postoperative central corneal ablation depth, and preoperative spherical equivalent at 12 months follow up in both groups


Both SMILE and femto-LASIK procedures can alter the biomechanical properties in the cornea. Changes in the corneal status were less after SMILE than after femto-LASIK. Both central corneal sensitivity and tear-film break up time impaired where the impairment less after the SMILE than after femto-LASIK

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