ESCRS - POANT032 - Evaluation And Comparison Of The Lens Diameter Of The Phakic Eye Using Cerebral Mri And Oct-Based Imaging

Evaluation And Comparison Of The Lens Diameter Of The Phakic Eye Using Cerebral Mri And Oct-Based Imaging

Published 2026 - 44th Congress of the ESCRS

Reference: POANT032 | Type: Free paper | DOI: 10.82333/mp2t-hp34

Authors: Dr Sophia Anna Reifeltshammer* 1 , Dr Leon Pomberger 1 , Mr Daniel Wallinger 2 , Mr Alexander Waal 1 , Mr Christopher Reischl 1 , Prof. Dr Matthias Bolz 1 , Prof. Dr Nino Hirnschall 1

1Department of Ophthalmology,Kepler University Clinic,Linz,Austria;Department of Ophthalmology,Johannes Kepler University,Linz,Austria, 2Department of Ophthalmology,Johannes Kepler University,Linz,Austria;Department of Ophthalmology,Kepler University Clinic,Linz,Austria

Purpose

To evaluate and compare the lens diameter (LD) measurements of the phakic eye using different imaging techniques

Setting

Department of Ophthalmology and Optometry, Kepler University Hospital, Linz, Austria

Department of Ophthalmology and Optometry, Johannes Kepler University, Linz

Methods

This prospective, single center study included patients that underwent standard preoperative cataract surgery assessment. Preoperative measurements included optical biometry (IOLMaster700, CZM, Germany) and three different anterior segment optical coherence tomography (AS-OCT) devices (OCT1: Anterion, Heidelberg Engineering, Germany; OCT2: Casia2, Tomey, Japan; OCT3: MS-39, CSO, Italy) as well as cerebral MRI scans (cMRI; MAGNETOM Vida, Siemens Healthineers, Germany) of 60 patients. For the cMRI, LD was measured by two independent observers. For the OCT devices, the LD was extrapolated from the anterior and posterior lens curvature.

Results

A total of 240 eyes from 120 patients were included. Mean age was 69 ± 14 years, and mean axial length was 24.21 ± 2.97 mm. In the cMRI, mean measured LD was 8.64 ± 0.30 mm, while in OCT2, mean LD was 10.07 ± 0.36 mm. A preliminary analysis showed a mean difference between OCT 2 and cMRI of 1.24 ± 0.35 mm, with a significant difference between the groups (p < 0.001), as OCT2 consistently yielded higher values.

A detailed analysis of the remaining OCT devices and potential determinants of the measured lens diameter will be presented at the annual meeting.

Conclusions

Preliminary data show a significant difference between the lens diameter measured in MRI and the one extrapolated from OCT. Knowledge or prediction of the lens diameter could be useful for future lens power calculations.