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Clinical science
Repeatability and reproducibility of a new fully automatic measurement optical low coherence reflectometry biometer and agreement with swept-source optical coherence tomography-based biometer
  1. Jinjin Yu1,2,
  2. Guoli Zhao1,2,
  3. Chak Seng Lei1,2,
  4. Ting Wan3,
  5. Rui Ning1,2,
  6. Wenqian Xing1,2,
  7. Xindi Ma1,2,
  8. Hongxian Pan1,2,
  9. Giacomo Savini4,
  10. Domenico Schiano-Lomoriello4,
  11. Xingtao Zhou1,2,
  12. Jinhai Huang1,2
  1. 1Eye Institute and Department of Ophthalmology, Institute for Medical and Engineering Innovation, Eye & ENT Hospital, NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Fudan University, Shanghai, China
  2. 2Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
  3. 3Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China
  4. 4G.B. Bietti Foundation I.R.C.C.S, Rome, Italy
  1. Correspondence to Dr Jinhai Huang, Eye Institute and Department of Ophthalmology, Institute for Medical and Engineering Innovation, Eye & ENT Hospital, Fudan University; NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Fudan University, Shanghai, Shanghai, 200031, China; vip999vip{at}163.com; Dr Xingtao Zhou; xingtaozhou{at}fudan.edu.cn

Abstract

Aims To assess the repeatability and reproducibility of the ocular measurements obtained with the Suoer SW-9000 μm Plus, a new fully automatic biometer based on optical low coherence reflectometry (OLCR) biometer, and to compare them to those obtained by a swept-source optical coherence tomography (SS-OCT)-based biometer.

Methods This prospective study consisted of 115 eyes of 115 healthy subjects. The measurements were taken by the two optical biometers in random order. The measured parameters were axial length (AL), central corneal thickness (CCT), aqueous depth (AQD), anterior chamber depth (ACD), mean keratometry (Km), lens thickness (LT) and corneal diameter (CD). To evaluate the intraobserver repeatability and interobserver reproducibility, the within-subject SD, test–retest variability, coefficient of variation (CoV) and intraclass correlation coefficient (ICC) were adopted. The Bland-Altman plot was drawn to assess the agreement.

Results The repeatability and reproducibility of all parameters for the new device were excellent (ICC>0.960 and CoV<0.71%). The Bland-Altman plots showed high agreement between the OLCR-based and SS-OCT-based devices for AL, CCT, AQD, ACD, Km and LT, with narrow 95% limit of agreements (LoAs) (−0.08 mm to 0.06 mm, −15.91 µm to −1.01 µm, −0.09 mm to 0.09 mm, −0.09 mm to 0.08 mm, −0.47 D to 0.35 D, −0.05 mm to 0.16 mm, respectively) and moderate agreement for CD (95% LoA: −0.67 mm to −0.01 mm).

Conclusions The new Suoer SW-9000 μm Plus biometer showed excellent repeatability and reproducibility. All the parameters obtained by this biometer were similar to those measured by SS-OCT-based biometer.

  • Imaging
  • Optics and Refraction

Data availability statement

Data are available on reasonable request.

http://dx.doi.org/10.1136/bjo-2023-323268

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    Data availability statement

    Data are available on reasonable request.

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    Footnotes

    • JY, GZ and CSL contributed equally.

    • Contributors Concept and design JY, GZ, CSL, XZ and JH; data collection TW, RN, WX, XM; statistical expertise JY, HP, GS, DS-L and JH; administrative, technical or logistic support XZ and JH; analysis and interpretation JY, GZ, CSL and JH; writing the article JY, GZ, XZ and JH; critical revision of the article JY, GS, DS-L, XZ and JH; final approval of the article JY, GZ, CSL, TW, RN, WX, XM, HP, GS, DS-L, XZ and JH; JH is the guarantor of this work; All authors reviewed the manuscript and agreed to be accountable for all aspects of the work.

    • Funding This work was supported in part by the Project of National Natural Science Foundation of China (grant no. 82271048); Shanghai Science and Technology (grant no. 22S11900200; 23XD1420500); EYE & ENT Hospital of Fudan University High-level Talents Program (Grant No. 2021318); Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning (Grant No. 2023); The contribution of I.R.C.C.S. Bietti Foundation was supported by Fondazione Roma and the Italian Ministry of Health (Grant No. 2022).

    • Disclaimer The funders had no role in study design, data collection and analysis, decision to publish, or reparation of the manuscript.

    • Competing interests None declared.

    • Provenance and peer review Not commissioned; externally peer reviewed.

    • Supplemental material This content has been supplied by the author(s). It has not been vetted by BMJ Publishing Group Limited (BMJ) and may not have been peer-reviewed. Any opinions or recommendations discussed are solely those of the author(s) and are not endorsed by BMJ. BMJ disclaims all liability and responsibility arising from any reliance placed on the content. Where the content includes any translated material, BMJ does not warrant the accuracy and reliability of the translations (including but not limited to local regulations, clinical guidelines, terminology, drug names and drug dosages), and is not responsible for any error and/or omissions arising from translation and adaptation or otherwise.