Precision of a new ocular biometer in eyes with cataract using swept source optical coherence tomography combined with Placido-disk corneal topography

Wenwen Wang, Yaxin Miao, Giacomo Savini, Colm McAlinden, Hao Chen, Qingjie Hu, Qinmei Wang, Jinhai Huang

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Abstract

The present study was to assess the precision (repeatability and reproducibility) of a new optical biometer (OA-2000, Tomey, Japan) based on swept-source optical coherence tomography (SS-OCT) and Placido disk topography in eyes with cataracts. Seventy-eight eyes from seventy-eight patients with cataracts were evaluated. Axial length (AL), anterior chamber depth (ACD), keratometry (K) over a 2.5 mm and 3.0 mm diameter, lens thickness (LT), central corneal thickness (CCT) and white-To-white (WTW) distance were measured by 2 skilled operators. OA-2000 measurements were highly repeatable and reproducible for all parameters (intraclass correlation, 0.925 to 1.000). OA-2000 derived K-values with a diameter of 3.0mm showed narrower 95% limits of agreement (LoA) (SRK/T:-0.18 to 0.16D; Holladay 1:-0.20 to 0.19D; Hoffer Q:-0.22 to 0.20D) than those with a diameter of 2.5 mm for IOL power calculations (SRK/T:-0.20 to 0.20D; Holladay 1:-0.23 to 0.23D; Hoffer Q:-0.25 to 0.25D). The precision (repeatability and reproducibility) of the OA-2000 was excellent for all parameters. The 3.0mm diameter K-readings appear to be the most reliable choice for calculation of IOL power with the OA-2000. In addition, the average values determined from each operator's 3 consecutive readings were more reproducible.

Original languageEnglish
Article number13736
JournalScientific Reports
Volume7
Issue number1
DOIs
Publication statusPublished - Oct 23 2017

ASJC Scopus subject areas

  • General

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