Evaluation of optical function using a new point spread function analysis system in cataractous and pseudophakic eyes: Preliminary results

Kazuno Negishi, Katsuhiko Kobayashi, Kazuhiko Ohnuma, Kenji Ohno, Toru Noda

研究成果: Article

7 引用 (Scopus)

抄録

Purpose: To evaluate optical function in cataractous and pseudophakic eyes using the new point spread function (PSF) analysis system in a clinical setting. Methods: We applied this new analysis system in the study of two cataractous eyes and one pseudophakic eye of two patients. Using a PSF analyzer, double-pass PSF was measured directly for each subject, and the single-pass modulation transfer function (MTF) and single-pass PSF were calculated. The simulated retinal images of various sizes of Landolt's rings and their contrast characteristics were also calculated by the PSF analyzer. Results: The MTF and the contrast of the simulated retinal images degraded in cataractous eyes were compared with data for normal eyes; the degradation pattern depended on the opacification pattern. The MTF and the contrast of the simulated retinal images in the pseudophakic eye improved significantly compared with the cataractous eyes, although both values were lower in the pseudophakic eye than in young normal eyes. Conclusions: Our data showed degradation of optical function in cataractous and pseudophakic eyes in comparison with optical function in young normal eyes. If further accumulations of PSF data are made, it may be possible to establish an objective standard by which to measure the progression of cataract, as well as an objective indication for treatment in the future.

元の言語English
ページ(範囲)12-19
ページ数8
ジャーナルJapanese Journal of Ophthalmology
50
発行部数1
DOI
出版物ステータスPublished - 2006 1

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Cataract
Therapeutics

ASJC Scopus subject areas

  • Ophthalmology

これを引用

Evaluation of optical function using a new point spread function analysis system in cataractous and pseudophakic eyes : Preliminary results. / Negishi, Kazuno; Kobayashi, Katsuhiko; Ohnuma, Kazuhiko; Ohno, Kenji; Noda, Toru.

:: Japanese Journal of Ophthalmology, 巻 50, 番号 1, 01.2006, p. 12-19.

研究成果: Article

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abstract = "Purpose: To evaluate optical function in cataractous and pseudophakic eyes using the new point spread function (PSF) analysis system in a clinical setting. Methods: We applied this new analysis system in the study of two cataractous eyes and one pseudophakic eye of two patients. Using a PSF analyzer, double-pass PSF was measured directly for each subject, and the single-pass modulation transfer function (MTF) and single-pass PSF were calculated. The simulated retinal images of various sizes of Landolt's rings and their contrast characteristics were also calculated by the PSF analyzer. Results: The MTF and the contrast of the simulated retinal images degraded in cataractous eyes were compared with data for normal eyes; the degradation pattern depended on the opacification pattern. The MTF and the contrast of the simulated retinal images in the pseudophakic eye improved significantly compared with the cataractous eyes, although both values were lower in the pseudophakic eye than in young normal eyes. Conclusions: Our data showed degradation of optical function in cataractous and pseudophakic eyes in comparison with optical function in young normal eyes. If further accumulations of PSF data are made, it may be possible to establish an objective standard by which to measure the progression of cataract, as well as an objective indication for treatment in the future.",
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AU - Noda, Toru

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