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A Comprehensive Assessment of the Precision and Agreement of Anterior Corneal Power Measurements Obtained Using 8 Different Devices

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  • Qinmei Wang
  • Giacomo Savini
  • Kenneth J Hoffer
  • Zhen Xu
  • Yifan Feng
  • Daizong Wen
  • Yanjun Hua
  • Feng Yang
  • Chao Pan
  • Jinhai Huang

Abstract

Purpose: To comprehensively assess the precision and agreement of anterior corneal power measurements using 8 different devices. Methods: Thirty-five eyes from 35 healthy subjects were included in the prospective study. In the first session, a single examiner performed on each subject randomly measurements with the RC-5000 (Tomey Corp., Japan), KR-8000 (Topcon, Japan), IOLMaster (Carl Zeiss Meditec, Germany), E300 (Medmont International, Australia), Allegro Topolyzer (Wavelight AG, Germany), Vista (EyeSys, TX), Pentacam (Oculus, Germany) and Sirius (CSO, Italy). Measurements were repeated in the second session (1 to 2 weeks later). Repeatability and reproducibility of corneal power measurements were assessed based on the intrasession and intersession within-subject standard deviation (Sw), repeatability (2.77Sw), coefficient of variation (COV), and intraclass correlation coefficient (ICC). Agreement was evaluated by 95% limits of agreement (LoA). Results: All devices demonstrated high repeatability and reproducibility of the keratometric values (2.77Sw 0.98). Repeated-measures analysis of variance with Bonferroni post test showed statistically significant differences (P

Suggested Citation

  • Qinmei Wang & Giacomo Savini & Kenneth J Hoffer & Zhen Xu & Yifan Feng & Daizong Wen & Yanjun Hua & Feng Yang & Chao Pan & Jinhai Huang, 2012. "A Comprehensive Assessment of the Precision and Agreement of Anterior Corneal Power Measurements Obtained Using 8 Different Devices," PLOS ONE, Public Library of Science, vol. 7(9), pages 1-8, September.
    • Handle: RePEc:plo:pone00:0045607
    DOI: 10.1371/journal.pone.0045607
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    Cited by:

    1. Jinhai Huang & Giacomo Savini & Hao Chen & Fangjun Bao & Yuanguang Li & Haisi Chen & Weicong Lu & Ye Yu & Qinmei Wang, 2015. "Precision and Agreement of Corneal Power Measurements Obtained Using a New Corneal Topographer OphthaTOP," PLOS ONE, Public Library of Science, vol. 10(1), pages 1-15, January.

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