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Correction of the Mobile Eye (Near Vision—Astigmatic Eye)

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

Abstract

When a lens that was calculated to correct oblique astigmatism in far vision is used for near vision a slight astigmatism results, usually negligible owing to the accommodation of the subject. For example, for an object 33 cm from the lens and at ω′ = 30°, a punctual lens of the Ostwalt type with a power-10 D produces 0.13 D astigmatism, which is not noticeable.

Keywords

Spherical Lens Flint Glass Continual Variation Oblique Defect Principal Section 
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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