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Corneal displacement during tonometry with a noncontact tonometer

  • Laboratory Investigation
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Abstract

Purpose

To measure the extent of corneal displacement during the early phase of tonometry using a noncontact tonometer and to determine the factors that affect the extent of the displacement.

Methods

The cornea was photographed in profile by use of a high-speed camera during tonometry with a noncontact tonometer. The frame rate of the camera was 5,000 frames/s. The extent of the displacement of the central corneal area at 13.2 ms after application of the air puff was measured in 115 healthy volunteers. The factors that affected the extent of the corneal displacement were determined by stepwise multiple linear regression analysis.

Results

The subjects’ age, sex, intraocular pressure (IOP), central corneal thickness, anterior chamber depth, and axial length were selected by the stepwise method. The results of the multiple linear regression analysis showed that subjects with low IOP, of older age, and of male sex had significantly greater displacement of the central cornea.

Conclusions

High-speed photography can be used to evaluate the degree of corneal displacement during tonometry with a noncontact tonometer. The amount of corneal displacement is affected by the individual’s IOP, age, and sex.

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Acknowledgment

This work was partially supported by grant no. 22591965 from the Japanese Ministry of Education, Culture, Science and Technology.

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Authors and Affiliations

  1. Department of Ophthalmology and Visual Science, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan

    Yoshiaki Kiuchi, Hideki Mochizuki & Joji Takenaka

  2. Department of Mechanical Engineering, Graduate School of Engineering, Osaka University, Osaka, Japan

    Makoto Kaneko & Kenji Yamada

  3. Department of Epidemiology, Infectious Disease Control and Prevention, Graduate School of Biomedical Science, Hiroshima University, Hiroshima, Japan

    Junko Tanaka

Authors
  1. Yoshiaki Kiuchi
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  2. Makoto Kaneko
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  3. Hideki Mochizuki
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  4. Joji Takenaka
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  6. Junko Tanaka
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Correspondence to Yoshiaki Kiuchi.

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Kiuchi, Y., Kaneko, M., Mochizuki, H. et al. Corneal displacement during tonometry with a noncontact tonometer. Jpn J Ophthalmol 56, 273–279 (2012). https://doi.org/10.1007/s10384-012-0131-x

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  • DOI: https://doi.org/10.1007/s10384-012-0131-x

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