ESCRS - PE002 - Aberrometric And Corneal Densitometry Outcomes Of A New Transepithelial Prk

Aberrometric And Corneal Densitometry Outcomes Of A New Transepithelial Prk

Published 2022 - 40th Congress of the ESCRS

Reference: PE002 | Type: ESONT - Abstract | DOI: 10.82333/y41y-qj25

Authors: Gorka Laucirica Saez*, Igor Illarramendi Mendicute 1 , Javier Mendicute del Barrio 1 , Jaime Aramberri Agesta 1

1Miranza Begitek,Donostia - San Sebastián,Spain

Purpose

To describe and compare corneal density, subjective refraction, visual acuity, and corneal higher order aberrations (HOA) after corneal refractive surgery using either conventional alcohol-assisted photorefractive keratectomy (PRK) or single-step transepithelial PRK (tPRK).

Setting/Venue

Miranza Begitek. Donostia – San Sebastián, Spain.

Methods

We performed a retrospective, observational, study in 120 right eyes from 120  healthy consecutive myopic patients who underwent conventional PRK or single-step tPRK to correct myopia of up to 6 diopters and astigmatism of up to 2 diopters. The WaveLight EX500® excimer laser (Alcon Laboratories, Inc.) was used in all cases. Visual acuity, subjective refraction, and Pentacam AXL® measurements were performed at the preoperative visit and at a 4-6-month follow-up visit. Pentacam AXL® software was used to assess corneal optical density and anterior corneal HOA.

Results

Both groups were similar in mean preoperative spherical equivalent values (−3.07±1.52 and −3.38±1.46 in the conventional PRK and tPRK groups respectively, p=0.21). There were no statistically significant differences in visual acuity and postoperative refraction between groups. Postoperative corneal densitometry did not show statistically significant differences in any of the areas studied. However, analysis of HOA showed statistically significant differences between the techniques (1.42±0.39 and 1.80±0.62 for the conventional PRK and tPRK groups, respectively; p=0.000).

Conclusions

Both conventional PRK and single-step tPRK gave comparable visual, refractive, and corneal density outcomes. Some differences were observed in HOA, but were not clinically relevant.