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; Tohru Noda

doi:10.1117/12.527931

13 July 2004 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, Tohru Noda

Author Affiliations +

Proceedings Volume 5314, Ophthalmic Technologies XIV; (2004) https://doi.org/10.1117/12.527931
Event: Biomedical Optics 2004, 2004, San Jose, CA, United States

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.

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Masahiro Shibutani, Katsuhiko Kobayashi, Gaku Takeuchi, Yumi Kubotera, Kazuhiko Ohnuma, Kazuno Negishi, Kenji Ohno, and Tohru Noda "Simulated retinal images of Landolt rings in human eyes including asymmetric aberrations on the point spread function analysis system", Proc. SPIE 5314, Ophthalmic Technologies XIV, (13 July 2004); https://doi.org/10.1117/12.527931

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