Comparing stromal ablation depth resulting from ReLEx SMILE vs LASIK

Session Details

Session Title: LASIK vs SMILE

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

Paper Time: 16:30

Venue: Room A3, Podium 2

First Author: : R.Pérez-Izquierdo SPAIN

Co Author(s): :    F. Poyales   D. Medel   A. Matamoros   I. Lopez-Brea   A. Gonzalez        

Abstract Details

Purpose:

To compare the amount of ablated stromal tissue, as a function of the refractive error to be corrected, resulting from either a ReLEx SMILE or a LASIK surgery

Setting:

IOA Madrid Innova Ocular, Spain

Methods:

The study encompassed 32 eyes treated with SMILE and 30 eyes treated with LASIK for myopia correction; in all procedures a 6.5 mm optical zone was employed. All eyes underwent a Pentacam examination both pre- and post-operatively, and the resulting corneal pachymetry values were then compared in order to estimate the ablation depth. A linear regression analysis was performed in both study groups, so as to test the correlation between the operated eye’s preoperative refraction (spherical equivalent) with the amount of tissue that was ablated during surgery

Results:

The correlation coefficient between the refractive error to be corrected and the resulting ablation depth was r = -0.75 for the ReLEx SMILE group and r = -0.70 for the LASIK group. When comparing the two study groups by means of linear regression analysis, it emerges that for refractive errors below 4 diopters of myopia, LASIK leads to a smaller amount of tissue being ablated; however, from that threshold onwards, less tissue was ablated in those eyes treated with ReLEx SMILE

Conclusions:

For both surgical techniques under assessment—ReLEx SMILE and LASIK—there is a moderately strong correlation between the amount of ablated tissue and the eye’s refractive correction. It is ReLEx SMILE the surgical approach that removes the least amount of tissue with high refractive errors

Financial Disclosure:

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