Analysis of corneal flap morphology and visual outcomes after FS-LASIK surgery assisted by two different femtosecond laser platforms: LenSx® vs IntraLase®

Session Details

Session Title: LASIK: Flap Morphology and Ablation Profile

Session Date/Time: Monday 09/10/2017 | 08:30-10:20

Paper Time: 09:28

Venue: Room 3.6

First Author: : M.Teus SPAIN

Co Author(s): :    C. Bouza-Miguens   A. Parafita   M. Garcia-Gonzalez   C. Villa-Collar           

Abstract Details

Purpose:

To compare the quality of corneal flaps and visual outcomes obtained after FS-LASIK surgery assisted by two different femtosecond lasers: LenSx® vs. Intralase®.

Setting:

Clinica Novovision de Madrid, Universidad Europea de Madrid, Universidad de Alcalá

Methods:

A prospective, observational study. One hundred myopic eyes that underwent FS-LASIK (using the LenSx® or the Intralase®) aiming for 110 µm flap thickness (FT), and using the same Allegretto® laser, were analyzed 3 months post-op. The FT was measured at the center and at 16 points along the horizontal axis, in each case, using an AS-OCT (Spectralis®). Visual function was evaluated in terms of postoperative VA and the residual refractive error. In addition, the mean changes in the total corneal aberrations (pre vs post-op), as well as the post-op corneal coma-like and spherical –like aberrations were analyzed.

Results:

Central FT was higher in the LenSx® goup (127.4± 8.4 vs 123.8±8.4 µm, p=0.02). We found no statistically significant difference in the overall FT between LenSx® (126.6±8.5µm) and Intralase® (124.4±8.25µm) (P>0.05). The intraflap FT standard deviation and the intraflap thickness range, were also similar between both groups (P>0.05), although the FT asymmetry at 2mm eccentricity was lower in the intralase flaps (5.46±4.09 vs 8.43±6.8 µm) (p=0.01). No significant difference was found in the UCDVA, the residual sphere or in the change in total corneal RMS in both groups (p>0.05)

Conclusions:

Intralase® seems to be more precise in terms of fap thickness homogeneity than the LenSx®. Efficacy, safety and predictability were comparable with the two laser platforms.

Financial Disclosure:

receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented, research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented, receives consulting fees, retainer, or contract payments from a competing company