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Proceedings Paper

Simulated retinal images of Landolt rings in human eyes including asymmetric aberrations on the point spread function analysis system
Author(s): Masahiro Shibutani; Katsuhiko Kobayashi; Gaku Takeuchi; Yumi Kubotera; Kazuhiko Ohnuma; Kazuno Negishi; Kenji Ohno; Tohru Noda
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Paper Abstract

To simulate the retinal images of the human eye including asymmetric aberrations is very important and interesting with using a new point spread function analysis system (PSFAS). The point light source (SLD 840 nm) was projected onto the subject's eye and the reflected image at the retina was captured by the charge coupled device which was in the conjugated point with the retina (double-pass formula). To obtain the modulation transfer function (MTF) of the optical system, equal sized apertures were used as entrance and exit pupils. To obtain the phase transfer function (PTF), unequal sized apertures were used. To obtain the simulated retinal images, the Fourier spectrum of the original chart was multiplied by the MTF and the PTF as the phase term of the original chart was added. The inverse Fourier transformation of the Fourier spectrum term and the phase term was the simulated retinal image. The simulated retinal images of the Landolt rings in human eyes might sufficiently involve asymmetric aberrations without losing the high-frequency range of spatial frequency. The PSFAS can simulate retinal images, which are based on not only the information from the symmetric aberrations and the scattering and absorption of haze but also on the information from the asymmetric aberrations. The PSFAS can objectively evaluate the characteristics of the human optical system and therefore is useful in an ophthalmology clinic setting.

Paper Details

Date Published: 13 July 2004
PDF: 8 pages
Proc. SPIE 5314, Ophthalmic Technologies XIV, (13 July 2004); doi: 10.1117/12.527931
Show Author Affiliations
Masahiro Shibutani, Topcon Corp. (Japan)
Katsuhiko Kobayashi, Topcon Corp. (Japan)
Gaku Takeuchi, Topcon Corp. (Japan)
Yumi Kubotera, Topcon Corp. (Japan)
Kazuhiko Ohnuma, Chiba Univ. (Japan)
Kazuno Negishi, Keio Univ. (Japan)
Kenji Ohno, National Tokyo Medical Ctr. (Japan)
Tohru Noda, National Tokyo Medical Ctr. (Japan)


Published in SPIE Proceedings Vol. 5314:
Ophthalmic Technologies XIV
Fabrice Manns; Per G. Soderberg; Arthur Ho, Editor(s)

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