May 2004
Volume 45, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2004
Consistency between a newly developed scanning peripheral anterior chamber analyzer and previous methods in evaluating anterior chamber biometry
Author Affiliations & Notes
  • T. Tsumura
    Ophthalmology, University of Yamanashi, Tamaho, Japan
  • K. Kashiwagi
    Ophthalmology, University of Yamanashi, Tamaho, Japan
  • K. Tagawa
    Takagi Seiko Inc, Nakano, Japan
  • J. Nakayama
    Takagi Seiko Inc, Nakano, Japan
  • H. Iijima
    Ophthalmology, University of Yamanashi, Tamaho, Japan
  • S. Tsukahara
    Ophthalmology, University of Yamanashi, Tamaho, Japan
  • Footnotes
    Commercial Relationships  T. Tsumura, None; K. Kashiwagi, K.Kashiwagi,Takagi Seiko Inc P; K. Tagawa, K.Kashiwagi,Takagi Seiko Inc P; J. Nakayama, K.Kashiwagi,Takagi Seiko Inc P; H. Iijima, None; S. Tsukahara, None.
  • Footnotes
    Support  none
Investigative Ophthalmology & Visual Science May 2004, Vol.45, 960. doi:
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      T. Tsumura, K. Kashiwagi, K. Tagawa, J. Nakayama, H. Iijima, S. Tsukahara; Consistency between a newly developed scanning peripheral anterior chamber analyzer and previous methods in evaluating anterior chamber biometry . Invest. Ophthalmol. Vis. Sci. 2004;45(13):960.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Abstract: : Purpose:We developed a non–invasive scanning peripheral anterior chamber analyzer (SPAC) for evaluating anterior chamber biometry. In this paper, we aimed to investigate consistency between SPAC and previous methods in evaluating anterior chamber biometry. Methods:Forty patients with glaucoma followed by University of Yamanashi Hospital were enrolled. SPAC scanned the anterior chamber depth (ACD) from the optical axis to the limbus in approximately 0.5 second and took 21 consecutive slit–lamp images at 0.4 mm intervals. SPAC automatically measured ACDs and drew an anterior chamber image from slit–lamp images. Averaged ACD values from three examinations were subject to comparison. SPAC–evaluated anterior chamber biometry were compared with van Herick’s peripheral anterior chamber depth classification, Shaffer’s classification of angle openness, and the angle–opening distance (AOD) at 500 microm measured by ultra–biomicroscope (UBM). Results:SPAC enabled to measure the ACD in a short time without touching the ocular surface. SPAC–evaluated anterior chamber biometry showed a high correlation with van Herick’s classification and Shaffer’s classification. The SPAC–measured peripheral ACD was significantly correlated with the AOD 500 (r = 0.84. p < 0.01) Conclusions:SPAC can measure peripheral ACD and values were correlated with the other methods to evaluate the anterior chamber configuration. It has potential use in measuring ACD quantitatively and evaluating anterior chamber biometry.

Keywords: anterior chamber • imaging/image analysis: clinical 
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