A new instrument for axial length measurement

  • A. Sawada
  • H. Shibata
  • A. Yamamoto
  • A. Nakamura
  • S. Demizu
Part of the Documenta Ophthalmologica Proceedings Series book series (DOPS, volume 51)

Summary

A simple and low-cost A-mode device for ocular biometry is described. The A-mode echogram is visible at a liquid crystal display for reference, whereas the intrinsic measuring accuracy is 0.01 mm. The sound velocity in the various ocular media can be adjusted independently. Averaging is automatically performed over 128 successive A-lines and after insertion of keratometric data the power of a lens implant is calculated with either of the four installed algorithms.

Keywords

Sound Velocity Axial Length Liquid Crystal Display Anterior Chamber Depth Corneal Curvature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Hoffer KJ. 1980. Biometry of 7,500 cataractous eyes. Am J Ophthalmol 90: 360–368.PubMedGoogle Scholar
  2. Jaffe NS. 1984. Cataract surgery and its complications, Mosby, St Louis.Google Scholar

Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • A. Sawada
    • 1
  • H. Shibata
    • 1
  • A. Yamamoto
    • 1
  • A. Nakamura
    • 1
  • S. Demizu
    • 1
  1. 1.Department of OphthalmologyMiyazaki Medical CollegeKiyotake, MiyazakiJapan

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