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Comparative optical coherence tomography study of differences in scleral shape between the superonasal and superotemporal quadrants

  • Clinical Investigation
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Abstract

Purpose

To determine the differences in scleral shape between the superonasal and superotemporal quadrants, the sites of scleral flap creation in trabeculectomy, using anterior segment optical coherence tomography (OCT).

Methods

Thirty-four right eyes of 34 enrolled subjects without ocular disease, with the exception of cataract or ametropia, were studied. Mean patient age was 63.2 ± 15.9 (standard deviation) years (range 28–84 years). The same examiner captured all images using anterior segment swept source OCT. The mean measurements were calculated from three images captured for each eye, 60° from the horizontal line passing through the pupillary center in the superonasal and superotemporal sclera. The radius of the scleral surface curvature and the area of the convex part of the sclera between the superonasal and the superotemporal quadrants were determined using image analysis software and the paired t test.

Results

The radius of the scleral curvature was significantly different in the superonasal quadrant and superotemporal quadrant (34.3 ± 12.6 vs. 18.3 ± 3.6 mm, respectively; P < 0.001). The area of the convex part of the sclera was also significantly different in the superonasal and superotemporal quadrants (0.36 ± 0.1 vs. 0.57 ± 0.1 mm2, respectively; P < 0.001).

Conclusions

Anterior segment OCT analysis of the scleral shape revealed a more gradual scleral gradient in the superonasal quadrant compared with the superotemporal quadrant.

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Conflicts of interest

M. Kasahara, None; N. Shoji, None; T. Morita, None; K. Shimizu, None.

Author information

Authors and Affiliations

  1. Department of Ophthalmology, Graduate School of Medical Science, School of Medicine, Kitasato University, 1-15-1 Kitasato, Minamiku, Sagamihara, Kanagawa, 252-0373, Japan

    Masayuki Kasahara, Nobuyuki Shoji & Kimiya Shimizu

  2. Department of Rehabilitation Orthoptics and Visual Science Course, School of Allied Health Sciences, School of Medicine, Kitasato University, Minamiku, Sagamihara, Kanagawa, Japan

    Nobuyuki Shoji

  3. Department of Ophthalmology, School of Medicine, Kitasato University, Minamiku, Sagamihara, Kanagawa, Japan

    Tetsuya Morita & Kimiya Shimizu

Authors
  1. Masayuki Kasahara
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  2. Nobuyuki Shoji
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  3. Tetsuya Morita
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  4. Kimiya Shimizu
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Corresponding author

Correspondence to Masayuki Kasahara.

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Kasahara, M., Shoji, N., Morita, T. et al. Comparative optical coherence tomography study of differences in scleral shape between the superonasal and superotemporal quadrants. Jpn J Ophthalmol 58, 396–401 (2014). https://doi.org/10.1007/s10384-014-0329-1

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  • DOI: https://doi.org/10.1007/s10384-014-0329-1

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