Comparison of posterior corneal changes after femtosecond-assisted laser in situ keratomileusis (Femto-LASIK) and small incision lenticule extraction (SMILE)

Session Details

Session Title: Corneal Refractive Surgery

Session Date/Time: Tuesday 17/09/2019 | 14:00-16:00

Paper Time: 14:51

Venue: Free Paper Forum: Podium 3

First Author: : B.Yildiz TURKEY

Co Author(s): :    D. Bektasoglu   O. Sonmez   Y. Yildirim   A. Agca                    

Abstract Details

Purpose:

To evaluate long term changes in posterior corneal parameters after FS-LASIK and SMILE procedures.

Setting:

Setting: University of Health Sciences Prof.Dr.N.Resat Belger Beyoglu Eye Training and Research Hospital, Istanbul Design: Evaluation of the clinical results, retrospective design.

Methods:

70 eyes of 35 patients who underwent FS LASIK and 70 eyes of 35 patients who underwent SMILE procedures between 2015 December- 2018 December and have at least 3 months follow up time were retrospectively reviewed. Scheimpflug and placido based corneal topographical analyses including posterior corneal keratometric values (Diopter), asphericity (Q value) and posterior elevation values (μm) and the postoperative changes of these parameters were compared between FS LASIK and SMILE.

Results:

Preoperative spherical equivalents were similar between groups. (-4 ± 1 D ; -4.4 ± 0.96 D) Mean follow up time was 20.5± 1.5 months for group 1 and 11.9 ±0.49 months for group 2. Postoperative posterior corneal curvature change was not statistifically significant for any of the groups in steep and flat meridians. Change in posterior elevation values were not different between groups postoperatively(p: 0.244) But asphericity was remarkably and more decreased (p<0.001) in femtoLASIK group than SMILE group in 4.5 mm zone although no significant change was observed in 8 mm zone.

Conclusions:

FS-LASIK seems to have more substantial affect on asphericity in central zone than SMILE.

Financial Disclosure:

None