May 2007
Volume 48, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2007
Evaluation of Visual Function in Eyes With Cataract Using a Point Spread Function Analyzer
Author Affiliations & Notes
  • T. Noda
    Disability and Rehabilitation Research, National Institute of Sensory Organs, Megro Ku, Japan
  • K. Fujiike
    Disability and Rehabilitation Research, National Institute of Sensory Organs, Megro Ku, Japan
  • K. Ohno
    Disability and Rehabilitation Research, National Institute of Sensory Organs, Megro Ku, Japan
  • K. Negishi
    Ophthalmology, keio University, School of Medicine, Tokyo, Japan
  • K. Ohnuma
    Disability and Rehabilitation Research, National Institute of Sensory Organs, Megro Ku, Japan
    Chiba University Faculty of Engineering, Chiba, Japan
  • Footnotes
    Commercial Relationships T. Noda, None; K. Fujiike, None; K. Ohno, None; K. Negishi, None; K. Ohnuma, Topcon Japan, C.
  • Footnotes
    Support None.
Investigative Ophthalmology & Visual Science May 2007, Vol.48, 1577. doi:https://doi.org/
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    • Get Citation

      T. Noda, K. Fujiike, K. Ohno, K. Negishi, K. Ohnuma; Evaluation of Visual Function in Eyes With Cataract Using a Point Spread Function Analyzer. Invest. Ophthalmol. Vis. Sci. 2007;48(13):1577. doi: https://doi.org/.

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

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Abstract

Purpose:: To evaluate visual function in eyes with a cataract using a point spread function (PSF) analyzer.

Methods:: Double-pass PSF images were analyzed using a PSF analyzer (Topcon, Tokyo) in 44 eyes with a cataract. Retinal images were simulated by convolution of the calculated single-pass PSFs using a variety of sizes of Landolt rings. The vision was estimated based on the contrast analysis of the simulated Landolt rings and compared with the subjective best-corrected visual acuity (BCVA) values. Modulation transfer functions of the optical systems were obtained through equal-sized apertures (the entrance and exit pupils), and the phase transfer functions were obtained through unequal-sized apertures. The simulated retinal images were reconstructed with and without a phase-retrieval algorithm.

Results:: No significant correlation between the subjective BCVAs and the estimated visual acuity by PSF analysis based on the unequal-pupil method with the phase-retrieval algorithm was seen; vision estimation correlated better with the equal-pupil method without the phase-retrieval algorithm in cataractous eyes.

Conclusions:: Evaluation of the visual function in eyes with a cataract is difficult using the double-pass method through unequal-sized apertures with the phase-retrieval algorithm. Better visual estimates were obtained without the phase-retrieval algorithm in cataractous eyes.

Keywords: cataract • visual acuity • imaging/image analysis: clinical 
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