Enhancement of lenticule thickness to improve outcomes of SMILE in low myopia

Session Details

Session Title: Small Lenticule Extraction I

Session Date/Time: Sunday 15/09/2019 | 08:00-10:00

Paper Time: 09:00

Venue: Free Paper Forum: Podium 1

First Author: : J.Siedlecki GERMANY

Co Author(s): :    N. Luft   L. Keidel   S. Priglinger   T. Archer   D. Reinstein   M. Dirisamer              

Abstract Details

Purpose:

To report the impact of manual increases in minimum lenticule (border) thickness on the safety and efficacy of small incision lenticule extraction (SMILE) in low myopia up to -3.50 diopters (D).

Setting:

Department of Ophthalmology, Ludwig Maximilians-University Munich; SMILE Eyes Linz, Austria

Methods:

SMILE for low myopia <-3.5 D was performed in 38 eyes with a programmed minimum lenticule thickness of 15 to 30 μm (thicker lenticule group). Safety and efficacy outcomes were compared to another group of 38 eyes with regular lenticule thickness of 10 µm (regular group) matched by spherical equivalent, age and visual acuity. Comparison of outcomes was performed with the Standard Graphs for Reporting Refractive Surgery and by analysis of higher order aberrations as provided on Scheimpflug imaging.

Results:

Mean lenticule thickness was 10 ± 0 vs. 20 ± 5 μm (p<0.0001). Mean SEQ preoperatively was -2.25 ± 0.51 (regular) and -2.24 ± 0.46 (thicker lenticule) D and changed to -0.11 ± 0.50 and +0.01 ± 0.36 D (p<0.0001 for both comparisons). Postoperatively, the thicker lenticule group showed better safety (1.20 vs 1.08; p=0.025) and efficacy (1.14 vs 0.96; p=0.011) indices with more eyes within ±0.50 D from target (91% vs 77%) and with at least 0.0 logMAR visual acuity (97% vs 86%), and fewer eyes losing one (3% vs 17%) and two (0% vs 3%) lines.

Conclusions:

Increasing minimum lenticule thickness seems to improve the safety and efficacy of SMILE in low myopia.

Financial Disclosure:

None