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Problems in phacomctry using slitlamp photograph Jihei Nakagawa , Akira Nakajima 1 1Depaetment of Opthalmology, Juntendo University school of Medicine pp.1185-1189
Published Date 1979/8/15
DOI https://doi.org/10.11477/mf.1410207952
  • Abstract
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Various factors such as centering, photography, assumption for calculation, causing errors in the estimation of the values of the optical elements of refractive elements of the eye using slitlamp pho-tography were analysed to improve the accuracy of the method. The following results were obtained.

1) The optical section of the crystalline or corneatakes eliptical shape. The photography using Sche-inpflug principle will reduce the error.

2) The angle between the slitbeam and camera can cause error of a few percentage if it is large, on the basis of paraxial ray calsulation.


Copyright © 1979, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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