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Corneal Astigmatism

  • Sami G. El Hage
  • Yves Le Grand
Chapter
  • 224 Downloads
Part of the Springer Series in Optical Sciences book series (SSOS, volume 13)

Abstract

We have assumed up to now that the anterior surface of the cornea, whose role is essential in ocular dioptrics, was a surface of revolution inside the utilized zone. This hypothesis is only an approximation; actual absence of an axis of revolution produces corneal astigmatism.

Keywords

Principal Direction Anterior Surface Paraxial Approximation Corneal Astigmatism Focal Line 
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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Copyright information

© Springer-Verlag Berlin Heidelberg 1980

Authors and Affiliations

  • Sami G. El Hage
    • 1
  • Yves Le Grand
    • 2
  1. 1.Eye Care AssociatesHoustonUSA
  2. 2.Director Du MuseeumParisFrance

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