Simulated retinal images of Landolt rings in human eyes including asymmetric aberrations on the point spread function analysis system

Masahiro Shibutani, Katsuhiko Kobayashi, Gaku Takeuchi, Yumi Kubotera, Kazuhiko Ohnuma, Kazuno Negishi, Kenji Ohno, Tom Noda

研究成果: Conference article

抜粋

We newly developed a Point Spread Function Analysis System (PSFAS) to study the optical system of the human eye. In this system, an infrared point light source is projected onto the subject's eye and the reflected image at the retina is captured by the charge coupled device (CCD) (i.e., double-pass formula). The single-pass modulation transfer function (MTF) is calculated from the captured image with equal sized apertures of the entrance and exit pupils, and the phase transfer function (PTF) is calculated from the captured image with unequal sized apertures of them. The optical transfer function (OTF) is deduced from this MTF and PTF, then retinal images can be simulated with both this OTF and the original charts. The smaller aperture of the incident ray is determined so as to give a diffraction limit, then the simulated retinal images include the information of asymmetric aberrations. The simulated retinal images of the Landolt's rings were compared with subjective sensations in the same subject with keratoconus. The PSFAS can objectively evaluate the characteristics of the human optical system and therefore is very useful in an ophthalmology clinic setting.

元の言語English
記事番号5314-42
ページ(範囲)229-236
ページ数8
ジャーナルProgress in Biomedical Optics and Imaging - Proceedings of SPIE
5
発行部数3
DOI
出版物ステータスPublished - 2004
イベントOphthalmic Technologies XIV - San Jose, CA, United States
継続期間: 2004 1 242004 1 27

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging

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