Impact of Ocular Residual Astigmatism on Visual and Refractive Outcomes Following Photorefractive Keratectomy.

Authors

Alireza Peyman, Amir Sadeghi, Mohammad Ghoreishi, Ali-Akbar Mortazavi, Pegah Noorshargh, Mohsen Pourazizi

Published in

Advanced biomedical research. Volume 15. Pages 50. Epub Sep 25, 2026.

Abstract

The aim of the study was to evaluate the impact of ocular residual astigmatism (ORA) on refractive and visual outcomes following photorefractive keratectomy (PRK) in myopic astigmatism patients.
This analytical cross-sectional study was performed on patients who underwent PRK. Patients were evaluated for refractive error, visual acuity, and keratometry before and six months after surgery. To calculate the ORA, vectorial differences between corneal plane refractive astigmatism and keratometric astigmatism were established.
Two hundred and six eyes from 206 patients including 117 females (56.8%), with a mean age of 32.32 ± 7.03 years were enrolled. The mean ORA was 0.79 ± 0.35 D. There was a negative correlation between cylinder magnitude (r = -0.24, P = 0.002), percentage of success of astigmatism surgery (r = -0.17, P = 0.01), and ORA. Patients with against-the-rule (ATR) astigmatism had high ORA (P = 0.01). The mean age was higher in patients with a high ORA; however, these differences did not reach a significant level (P = 0.07).
We found comparable visual outcomes between eyes with low and high ORA that were treated with PRK. Patients with ATR astigmatism had more ORA and the success of astigmatism surgery was lower in patients with a higher ORA.

PMID:
42891487
Bibliographic data and abstract were imported from PubMed on 18 Oct 2026.

Read full publication at:
Please sign in to see all details.

Stats

1-terrible, 9-excellent. How would you rate this publication? Sign in in to submit your rating.

Post a comment

You need to be signed in to post comments. You can sign in here.

Comments

There are no comments yet.