Visual and refractive outcomes after wavefront-optimised, conventional topography-guided, and topography-modified refraction LASEK in myopia and myopic astigmatism

Session Details

Session Title: Corneal Refractive Surgery

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

Paper Time: 14:00

Venue: Free Paper Forum: Podium 3

First Author: : Y.Yoo SOUTH KOREA

Co Author(s): :    Y. Kim   K. Shin   D. Lim   T. Chung                    

Abstract Details

Purpose:

To compare the visual and refractive outcomes of wavefront-optimized (WFO), topography-guided (utilizing the protocol approved by US Food and Drug Administration; TG), and topography-modified refraction (TMR) Laser subepithelial keratomileusis(LASEK) surgery for myopia and myopic astigmatism.

Setting:

In this retrospective study included patients who underwent WFO-LASEK (88 eyes), TMR-LASEK (28 eyes), and conventional TG-LASEK (30 eyes) procedure with the same refractive platform (ContouraTM Vision software and WaveLight® EX500 excimer laser) to correct myopia and myopic astigmatism from July 2017 to September 2018.

Methods:

We measure and analysis pre- and post-operatively for following parameters: uncorrected distance visual acuity(UDVA), corrected distance visual acuity (CDVA), manifest spherical and cylindrical refraction, and corneal topography (Topolyzer VARIO) and tomography (Scheimpflug-image based). Follow-up visits were conducted for at least 6 months.

Results:

6 months postoperatively, UDVA was 0.0 logMAR or better in 88.6%, 90.0%, 89.3% in WFO, TG, and TMR groups, respectively (p=.068). Postoperative high order aberrations including total HOA, coma and SE were increased in all groups compared with preoperative values, but there were no significant difference between three groups. However, predictability of spherical equivalent correction (achieved SE versus attempted SE) and residual cylindrical refractive error were significantly difference in TG group compared with TMR or WFO groups (p=.022, p=.048)

Conclusions:

Although WFO-, FDA- and TMR-LASEK for myopia and myopic astigmatism gave safe and excellent visual outcomes, TG-LASEK procedure was associated with better effectively achieved predictable refractive outcomes than TMR- and WFO-LASEK.

Financial Disclosure:

None