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Objective evaluation of planned vs achieved stromal thickness reduction in femtosecond laser-assisted myopic LASIK

Poster Details

First Author: G.Pamel USA

Co Author(s):    A. Kanellopoulos   G. Asimellis                 

Abstract Details

Purpose:

To evaluate corneal stromal thickness reduction in myopic LASIK and compare attempted to achieved ablation depth in a consecutive case series study.

Setting:

LaserVision.gr Clinical and Research Eye Institute

Methods:

Stromal thickness reduction was investigated in 205 consecutive myopic and myopic astigmatic LASIK eyes. Anterior-segment optical coherence tomography (AS-OCT, Rt-Vue-100, Optovue, Fremont, CA) was employed to provide pre-operative and three-month postoperative pachymetry. Minimum stromal thickness was evaluated. Epithelial thickness remodeling was also evaluated in order to achieve objective maximum stromal thickness reduction. The derived maximum stromal thickness reduction was then compared to the programmed (planned) maximum ablation depth. Deviations of planned vs. achieved maximum stromal thickness changes were correlated with residual refractive error.

Results:

The three-month stromal reduction was 86.01±28.28 μm, compared to the average programmed maximum ablation depth of 88.48±26.05 μm. The attempted vs. achieved thickness outliers correlated with deviations in achieved refractive correction.

Conclusions:

Actual objective stromal thickness reduction following myopic LASIK correlates well with the attempted versus achieved refractive change.

Financial Disclosure:

One or more of the authors travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented

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