Comparative wavefront aberration outcomes of small incision lenticule extraction (SMILE) and femto LASIK treatments

Session Details

Session Title: LASIK vs SMILE

Session Date/Time: Monday 24/09/2018 | 16:30-18:00

Paper Time: 17:12

Venue: Room A3, Podium 2

First Author: : A.Hamid UK

Co Author(s): :    A. Shortt   W. Muen   J. Dermott   C. O'Donnell   A. Hartwig   S. Vaswani     

Abstract Details

Purpose:

To report comparative visual acuity, refraction and aberrometry data between groups treated with either Small Incision Lenticule Extraction (SMILE) or Femto-LASIK

Setting:

Optegra Eye Hospital London, UK

Methods:

The study population consisted of non-monovision patients in each prescription-matched group (SMILE N=56, Femto-LASIK N=48). Patients underwent either SMILE surgery using Zeiss Visumax Laser System (Carl Zeiss Meditec, Germany) or Femto-LASIK on the same laser within a private eye hospital group in the UK. Unaided distance and near visual acuity (UDVA, DCNVA), spherical equivalent refraction and RMS values of higher order aberrations of right eyes were evaluated pre- and post-operatively.

Results:

The unaided binocular distance vision results showed that 96% and 100% of the Femto-LASIK and SMILE groups respectively achieved 6/6 or better by the one month stage, and 92% (Femto) and 95% (SMILE) achieved 6/6 or better monocular UDVA. There were no significant differences between pre- and post-op visual acuities or spherical equivalent refraction between the groups (p>0.05). Spherical aberration was significantly different between SMILE and LASIK procedures (SMILE 0.01, LASIK 0.11m, p = 0.001). Differences between SMILE and LASIK changes in HOA RMS were not significant (SMILE 0.18 m, LASIK 0.14 m, p = 0.416).

Conclusions:

This study demonstrated good results with induced change in spherical aberration values being significantly reduced in SMILE treatments compared with Femto-LASIK. No significant differences were evident between the treatments in this study in terms of post-operative refraction and unaided monocular visual acuity. Further research is however required to better understand the impact of SMILE on aberration profiles and visual outcomes.

Financial Disclosure:

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