Epithelial Remodelling After Hyperopic And Mixed Astigmatism Transprk

Published 2024 - 42nd Congress of the ESCRS

Reference: FP04.11 | Type: Free paper | DOI: 10.82333/4eas-xg27

Authors: Diego De Ortueta* ¹

¹Refractive,AURELIOS,Recklinghausen,Germany

Purpose

To calculate the refractive power associated with the change in epithelial thickness after refractive correction with TransPRK

Setting

Aurelios Augenzentrum Recklinghausen, Germany

Methods

We analyzed the changes in epithelium in a consecutive retrospective group of hiperopic eyes treated with TransPRK with the AMARIS 1050 RS laser platform (Schwind Eye-Tech Solutions, Kleinhostheim, Germany) with a minimal follow-up of 4 months.

The group of 95 treated eyes had an average age of 36 years.

The preoperative mean sphere was +1.6 dioptres (D) with a range till +5D, and the mean cylinder was -2.16 D with a range till -5.75D.

For the epithelium measurements, we used the anterior segment optical coherence tomography MS-39 (CSO, Florence, Italy).

Results

The refractive outcome showed a mean sphere of -0.03 D (range -0.5 to 1 D) and a mean cylinder of -0.33 (range -1.75 to 0 D). 93% and 98% of the cases had 0.5D, 1D, respectively, or less of spherical equivalent refractive error.

The epithelium showed preoperative toricity, correlating to the preoperative manifest astigmatism.

Postoperatively, at 6 mm, the epithelium showed a mean refractive change of the cardinal astigmatism of -7 microns and the oblique astigmatism of -4.7 microns.

The postoperative dioptric epithelium change causes -0.8 D of refraction.

Conclusions

The preoperative toricity of the epithelium is correlated with the amount of preoperative astigmatism.

The epithelium causes postoperative undercorrection in hyperopia.