ESCRS - FP31.09 - Corneal Wavefront Analysis With Anterior Segment Ss-Oct Versus Placido-Combined Sd-Oct In Cataract Patients

Corneal Wavefront Analysis With Anterior Segment Ss-Oct Versus Placido-Combined Sd-Oct In Cataract Patients

Published 2023 - 41st Congress of the ESCRS

Reference: FP31.09 | Type: Free paper | DOI: 10.82333/2pbs-7q76

Authors: Stefan Georgiev* 1 , Manuel Ruiss 2 , Andreea Dana Fisus 2 , Rainer Leitgeb 3 , Oliver Findl 2

1Vienna Institute for Research in Ocular Surgery,Vienna,Austria;Center for Medical Physics and Biomedical Engineering,Vienna,Austria, 2Vienna Institute for Research in Ocular Surgery,Vienna,Austria, 3Center for Medical Physics and Biomedical Engineering,Vienna,Austria

Purpose

To comprehensively evaluate the agreement of component corneal wavefront aberrations from a swept source optical coherence tomographer (SS-OCT) and a referential Placido-topography combined OCT device in cataract patients.

Setting

Department of Ophthalmology, Hanusch Hospital, Vienna, Austria.

Methods

103 eyes from 103 patients scheduled for routine cataract surgery were measured on the same day with a SS-OCT (Heidelberg Engineering, Germany) device and a Placido-topography combined OCT device (CSO, Italy). Anterior, total, and posterior corneal wavefront aberrations were evaluated for their mean differences, inter-device correlation coefficients (r), and limits of agreement (LoA) via Bland-Altman plots.

Results

Mean differences of all corneal aberrometric parameters did not exceed 0.05 μm. Inter-device agreement was high for total corneal horizontal astigmatism (LoA = -0.46 to 0.42 μm; r = 0.88) and spherical aberration (LoA: -0.11 to 0.08 μm; r= 0.77), and moderate for oblique astigmatism (LoA= -0.37 to 0.41 μm; r= 0.70), oblique trefoil (LoA= -0.19 to 0.17 μm; r= 0.65), vertical coma (LoA= -0.33 to 0.25 μm; r= 0.58), horizontal coma (LoA= -0.20 to 0.22 μm; r= 0.63), horizontal trefoil (LoA= -0.22 to 0.20 μm; r= 0.57), and RMS HOA (LoA= -0.22 to 0.28 μm; r= 0.65). Vector analysis revealed no statistically significant mean differences for anterior, total, and posterior corneal astigmatism in dioptric vector space.

Conclusions

Corneal wavefront analysis from the SS-OCT device showed functional equivalency to the referential device in eyes undergoing cataract surgery with a regular cornea. However, clinically relevant higher order aberration parameters should be interpreted with caution for surgical decision-making.