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Repeatability in biometric parameters measured with two swept-source optical coherence tomography biometers and one optical low coherence reflectometry biometer

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First Author: A.Fisus AUSTRIA

Co Author(s):    N. Hirnschall   M. Ruiss   C. Pilwachs   O. Findl           

Abstract Details

Purpose:

Aim of this study is to determine the repeatability of ocular biometric parameters (axial length - AL, keratometry, anterior chamber depth/aqueous depth - ACD/AQD, lens thickness - LT) obtained using three biometry devices, two swept-source optical coherence tomography (ss-OCT) biometers and an optical low coherence reflectometry (OLCR) device.

Setting:

Vienna Institute for Research in Ocular Surgery, Hanusch Hospital, Vienna, Austria

Methods:

This prospective, observational study included 50 eyes of 50 patients examined prior to cataract surgery. Each patient was measured three times with each device: two ss-OCT: IOLMaster 700 (biometer A, Carl Zeiss, Medited AG, Jena, Germany) and ANTERION (biometer B, Heidelberg Engineering GmbH, Heidelberg, Germany) and an OLCR, Lenstar LS 900 (biometer C, Haag-Streit AG, Koenitz, Switzerland). Patients with age-related cataract and no other significant ocular comorbidities that could influence the measurements were included. Repeatability was assessed using within-subject standard deviation (Sw) and coefficient of variation (CoV).

Results:

The Sw values for AL were 0.105 mm for biometer A, 0.010 mm for biometer B and 0.084 mm for biometer C. For steep and flat keratometry the Sw was 0.233/0.194 diopters (D) for biometer A, 0.039/0.146 D for biometer B and 0.186/0.193 D for biometer C. For ACD/AQD and LT the Sw was 0.039 mm and 0.012 mm for biometer A, 0.003 mm and 0.038 mm for biometer B while, 0.135 mm and 0.182 mm for biometer C. While the CoV was less than 0.90% for all parameters investigated, exception being AQD and LT for biometer C, (less than 2%).

Conclusions:

All three biometers showed a good repeatability for the biometric parameters investigated. The ss-OCT biometers showed a slightly better repeatability compared to the OLCR biometer in the case of AQD and LT.

Financial Disclosure:

... receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented, ... research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented