Posters

Evaluation of posterior corneal curvature changes after small incision lenticule extraction

Poster Details

First Author: A.D INDIA

Co Author(s):    N. Kumar                    

Abstract Details

Purpose:

To study the changes in posterior corneal curvature in participants undergoing small incision lenticule extraction (SMILE) with mild, moderate and high degree of myopia, and the correlation of the changes with residual refractive error.

Setting:

Department of Refractive Surgeries, Lotus Eye Hospital and Institute, Coimbatore, TN, India

Methods:

A single centre prospective trial to observe changes following SMILE for a follow-up period of 3 months.280 eyes of 140 participants were enrolled for the study. 248 eyes of 124 participants were found eligible for the study at the end of the study duration. Participants were assigned into three groups based on the amount of mean refractive spherical equivalent; Mild myopia (<-3D), Moderate myopia (>-3D to < -6D) and high myopia (> -6D)

Results:

Residual MRSE post-SMILE within ±0.50 D was found to be 91.1% in mild, 90.65% in moderate and 81.5% in the high degree of myopia. The posterior keratometric readings increased significantly among all the groups at the postoperative 1-week follow-up with p-value less than 0.001 in all three groups, which did not change significantly at 1-month and 3-month. Increase in the negative dioptric power of posterior surface is significantly related with higher residual MRSE in the mild myopia group (r=0.301, p=0.007), while correlation was not significant in moderate and high myopia group.

Conclusions:

The posterior corneal curvature change following SMILE may play a contributing role in residual refractive error, and warrants a trial for its inclusion in the calculations to target emmetropia.

Financial Disclosure:

None