Comparison of reproducibility of corneal measurements by anterior segment optical coherence tomography in keratoconus and normal eyes

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  • Saito Aya
    Department of Ophthalmology, School of Medicine, Kitasato University International University of Health and Welfare
  • Kamiya Kazutaka
    Department of Orthoptics and Visual Sciences, School of Allied Health Science, Kitasato University
  • Fujimura Fusako
    Department of Orthoptics and Visual Sciences, School of Allied Health Science, Kitasato University
  • Hoshikawa Rie
    Department of Orthoptics and Visual Sciences, School of Allied Health Science, Kitasato University
  • Takahashi Masahide
    Department of Ophthalmology, School of Medicine, Kitasato University
  • Shoji Nobuyuki
    Department of Ophthalmology, School of Medicine, Kitasato University

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  • 前眼部光干渉断層計における円錐角膜眼と正常眼の再現性の比較

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Abstract

<p>PURPOSE: To compare the keratoconus and normal eyes for reproducibility using CASIA2.</p><p>METHODS: Corneal measurements of 20 keratoconus eyes (K group) were obtained using anterior segment optical coherence tomography (CASIA2, Tomey, Japan) and compared with 20 normal eyes (N group) for reproducibility. The intraclass correlation coefficient (ICC), Bland-Altman plot, and coefficient of variation (CV) were used to evaluate the reproducibility of both groups.</p><p>RESULTS: Both groups showed high agreements in anterior and posterior keratometry (ICC > 0.9). However, the reproducibility (CV) in the N group (CV < 0.7) was higher than that in the K group (CV < 2.0). Moreover, the same result was obtained in central corneal thikness (CCT), and anterior chamber depth (ACD), but the CV in the K group was larger than that in the N group for all parameters.</p>

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