ESCRS - FP06.06 - RAY-TRACED CORNEAL WAVEFRONT ABERRATIONS FROM LONG-RANGE SS-OCT-BASED DATA: OPTICAL ZONE REPEATABILITY AND IMPLICATIONS FOR REFRACTIVE CATARACT SURGERY

RAY-TRACED CORNEAL WAVEFRONT ABERRATIONS FROM LONG-RANGE SS-OCT-BASED DATA: OPTICAL ZONE REPEATABILITY AND IMPLICATIONS FOR REFRACTIVE CATARACT SURGERY

Published 2025 - 29th ESCRS Winter Meeting

Reference: FP06.06 | Type: Free Paper | DOI: 10.82333/8hag-md97

Authors: Stefan Georgiev* 1 , Manuel Ruiss 1 , Janina Zoysa 1 , Caroline Pilwachs 1 , Oliver Findl 1

1Ophthalmology Department Hanusch Hospital,Vienna Institute for Research in Ocular Surgery,Vienna,Austria

Purpose

To comprehensively evaluate the repeatability of component ray-traced corneal wavefront aberrations measured by a swept source optical coherence tomographer (SS-OCT) for clinically relevant optical zone diameters in cataract patients.

Setting

Department of Ophthalmology, Hanusch Hospital, Vienna, Austria

Methods

Retrospective data analysis of repeated measurements with a long range SS-OCT (ANTERION, Heidelberg Engineering) biometer by a single observer in randomly selected 54 eyes from 54 patients scheduled for cataract surgery. After an investigational software update, anterior, total, and posterior corneal wavefront aberration terms were evaluated for their within subject standard deviation (Sw) and repeatability limit (r) at pupil-centered 3-mm, 4-mm, and 5-mm optical zone diameters. 

Results

The precision of component corneal Zernike polynomial terms was dependent on optical zone diameter and aberration magnitude. First radial order Zernike polynomial terms exhibited the least precision, followed by second-order terms. Except for lower-order terms at a 5-mm pupil zone, all Zernike terms had a repeatability limit threshold below 0.1 μm. Aside from vertical tilt, all anterior, total, and posterior corneal aberration terms had a repeatability limit below 0.07 μm for 3-mm and 4-mm optical zone diameters.

Conclusion

Ray-traced corneal wavefront aberrometry from long range SS-OCT data revealed highly precise measurement output, in particular for optical zone diameters relevant for intraocular lens power calculations in cataract surgery. Wavefront aberration misalignment appears to be the primary cause for measurement variability in non-paraxial ray-tracing.