Posters

Comparison of biomechanical properties between eyes after small incision lenticule extraction (SMILE) and laser in situ keratomileusis (LASIK)

Poster Details

First Author: T.Kojima JAPAN

Co Author(s):    T. Kataoka   A. Hasegawa   T. Nakamura   K. Ichikawa     

Abstract Details

Purpose:

To compare the biomechanical properties in eyes after small incision lenticule extraction (SMILE) and laser in situ keratomileusis (LASIK)

Setting:

Nagoya Eye Clinic, Nagoya, Japan

Methods:

Ten patients who underwent SMILE in one eye and LASIK in the other eye were enrolled in the study. All patients finished 6 month follow-up after surgery. Average age of patients was 30±4.0 y.o. Corneal biomechanical parameters, intraocular pressure and corneal pachymetry were measured using Corvis ST (Occulus). Consecutive 3 measurements were taken, and average value was applied for analyses. Wilcoxon signed-rank test was performed for comparison analysis and p< 0.05 was considered statistically significant.

Results:

There were no significant differences in the mean spherical equivalent between SMILE (-3.89±0.76D) and LASIK group (-3.56±1.18D) (p= 0.13). There were no significant differences in the intraocular pressure between SMILE (7.2±3.2mmHg) and LASIK group (8.6±2.4mmHg)(p= 0.15). Central corneal thickness in SMILE group (476.0±35.5μm) was significantly thinner than LASIK group (495.6±31.6μm). (p=0.002) Applanation time, corneal velocity, applanation length, highest concavity (HC) time, HC deformation amplitude and HC radius showed no difference between two groups. HC peak distance in SMILE group (5.8±0.41) was significantly longer than LASIK group (5.4±0.22) (p= 0.04).

Conclusions:

This study shows that there may be difference in corneal biomechanical properties between eyes after SMILE and LASIK surgery. FINANCIAL INTEREST: NONE