May 2003
Volume 44, Issue 13
ARVO Annual Meeting Abstract  |   May 2003
Wavefront Analysis of Crystalline Lenses Using a Hartman-Shack Aberrometer and Videokeratoscope
Author Affiliations & Notes
  • K. Ohnuma
    Faculty Engineering, Chiba Univ, Chiba, Japan
  • K. Negishi
    Ophthalmology, Keio University School of Medicine, Tokyo, Japan
  • K. Kobayashi
    R&d, Topcon, Tokyo, Japan
  • Y. Fukuma
    R&d, Topcon, Tokyo, Japan
  • T. Shioiri
    R&d, Topcon, Tokyo, Japan
  • K. Ohno
    Ophthalmology, National Tokyo Medical Center, Tokyo, Japan
  • T. Noda
    Ophthalmology, National Tokyo Medical Center, Tokyo, Japan
  • Footnotes
    Commercial Relationships  K. Ohnuma, None; K. Negishi, None; K. Kobayashi, Topcon corpration E; Y. Fukuma, Topcon corpration E; T. Shioiri, Topcon corpration E; K. Ohno, None; T. Noda, None.
Investigative Ophthalmology & Visual Science May 2003, Vol.44, 222. doi:
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    • Get Citation

      K. Ohnuma, K. Negishi, K. Kobayashi, Y. Fukuma, T. Shioiri, K. Ohno, T. Noda; Wavefront Analysis of Crystalline Lenses Using a Hartman-Shack Aberrometer and Videokeratoscope . Invest. Ophthalmol. Vis. Sci. 2003;44(13):222.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract: : Purpose: To establish a method for analyzing aberrations of crystalline lenses and determine the accuracy of the method. Methods: By inversely propagating the rays obtained using a Hartman-Shack aberrometer at the front of the crystalline lenses using a computer ray tracing method and determining the corneal topography using a videokeratoscope, the wavefront in front of the crystalline lens was calculated and the aberration was analyzed by Zernike polynominals. The accuracy of applying this method to the eye with an intraocular lens (IOL) and a normal cornea was evaluated. Results: The proposed method was established by using an adequate index of the cornea and anterior chamber (840 nm) and an approximation of the fourth-order xnym polynomial for the topography of the corneal center. The calculated mean power of the IOL was nearly equal to the value provided by the IOL manufacturer. The prism component in the wavefront then was detected, resulting from the tilt and/or decentration of the IOL. Conclusions: The method of wavefront analysis of crystalline lenses using a Hartman-Shack aberrometer and a videokeratoscope was established and the accuracy of the method was confirmed. The method is clinically useful to objectively evaluate the visual function of crystalline lenses.

Keywords: crystallins • optical properties • physiological optics 

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