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Related Experiment Video

Updated: May 31, 2026

Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile

Published on: September 20, 2024

Advanced corneal surface ablation efficacy in myopia: changes in higher order aberrations.

Tahra AlMahmoud¹, Rejean Munger, W Bruce Jackson

¹Department of Surgery, Faculty of Medicine and Health Sciences, United Arab Emirates University, Al Ain, UAE. uaeye27@hotmail.com

Canadian Journal of Ophthalmology. Journal Canadien D'Ophtalmologie

|June 29, 2011

Summary

Wavefront-guided advanced surface ablation for myopia increases ocular and corneal higher-order aberrations (HOAs) and spherical aberration (SA). Induced aberrations strongly correlate with the applied spherical correction, suggesting potential for ablation pattern modification.

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$Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter$

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Area of Science:

Ophthalmology
Refractive Surgery
Corneal Aberrations

Background:

Higher-order aberrations (HOAs) can impact visual quality after refractive surgery.
Wavefront-guided advanced surface ablation (WF-ASA) aims to minimize induced aberrations.

Purpose of the Study:

To compare ocular and corneal HOAs after WF-ASA for myopia using four epithelial management techniques.
To evaluate the correlation between induced aberrations and preoperative measurements or applied correction.

Main Methods:

Retrospective analysis of 240 eyes undergoing WF-ASA.
Ocular and corneal aberrations measured preoperatively and 3 months postoperatively.
Zernike polynomial analysis focused on total HOAs and spherical aberration (SA).

Main Results:

All WF-ASA techniques significantly increased ocular and corneal HOAs and SA.
Induced ocular aberrations showed no significant difference between techniques.
Induced corneal aberrations differed significantly between techniques; both ocular and corneal aberrations correlated strongly with applied spherical correction.

Conclusions:

WF-ASA for myopia increases ocular and corneal HOAs and SA, regardless of epithelial management technique.
Applied spherical correction is a primary driver of induced aberrations.
Optimizing ablation patterns to compensate for induced HOAs may enhance surgical outcomes.