Back to Journals » Clinical Ophthalmology » Volume 10

LASIK and PRK in hyperopic astigmatic eyes: is early retreatment advisable?

Authors Frings A, Richard G, Steinberg J, Druchkiv V, Linke S, Katz T

Received 25 October 2015

Accepted for publication 12 December 2015

Published 31 March 2016 Volume 2016:10 Pages 565—570

DOI https://doi.org/10.2147/OPTH.S99098

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Gokcen Gökçe

Peer reviewer comments 3

Editor who approved publication: Dr Scott Fraser


Andreas Frings,1 Gisbert Richard,1,2 Johannes Steinberg,1,3,4 Vasyl Druchkiv,1,4 Stephan Johannes Linke,1,3,4 Toam Katz1,4

1
Department of Ophthalmology, University Medical Centre Hamburg-Eppendorf, 2Ophthalmologikum an der Alster, 3zentrumsehstärke, 4CARE Vision Germany GmbH, Hamburg, Germany

Purpose: To analyze the refractive and keratometric stability in hyperopic astigmatic laser in situ keratomileusis (LASIK) or photorefractive keratectomy (PRK) during the first 6 months after surgery.
Patients and methods:
This retrospective cross-sectional study included 97 hyperopic eyes; 55 were treated with LASIK and 42 with PRK. Excimer ablation for all eyes was performed using the ALLEGRETTO excimer laser platform using a mitomycin C for PRK and a mechanical microkeratome for LASIK. Keratometric and refractive data were analyzed during three consecutive follow-up intervals (6 weeks, 3 months, and 6 months). The corneal topography was obtained using Scheimpflug topography, and subjective refractions were acquired by expert optometrists according to a standardized protocol.
Results:
After 3 months, mean keratometry and spherical equivalent were stable after LASIK, whereas PRK-treated eyes presented statistically significant (P<0.001) regression of hyperopia. In eleven cases, hyperopic regression of >1 D occurred. The optical zone diameter did not correlate with the development of regression.
Conclusion: After corneal laser refractive surgery, keratometric changes are followed by refractive changes and they occur up to 6 months after LASIK and for at least 6 months after PRK, and therefore, caution should be applied when retreatment is planned during the 1st year after surgery because hyperopic refractive regression can lead to suboptimal visual outcome. Keratometric and refractive stability is earlier achieved after LASIK, and therefore, retreatment may be independent of late regression.

Keywords: hyperopia, astigmatism, regression, keratometry

Creative Commons License This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution - Non Commercial (unported, v3.0) License. By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms.

Download Article [PDF]  View Full Text [HTML][Machine readable]