Retinal nerve fiber layer retardation measurements using a polarization-sensitive fundus camera

Yasufumi Fukuma; Yoshio Okazaki; Takashi Shioiri; Yukio Iida; Hisao Kikuta; Motohiro Shirakashi; Kiyoshi Yaoeda; Haruki Abe; Kazuhiko Ohnuma

doi:10.1117/1.3600772

1 July 2011 Retinal nerve fiber layer retardation measurements using a polarization-sensitive fundus camera

Yasufumi Fukuma, Yoshio Okazaki, Takashi Shioiri, Yukio Iida, Hisao Kikuta, Motohiro Shirakashi, Kiyoshi Yaoeda, Haruki Abe, Kazuhiko Ohnuma

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Journal of Biomedical Optics, Vol. 16, Issue 7, 076017 (July 2011). https://doi.org/10.1117/1.3600772

Abstract

To measure the retardation distribution of the optic retinal nerve fiber layer (RNFL) from a single image, we have developed a new polarization analysis system that is able to detect the Stokes vector using a fundus camera. The polarization analysis system is constructed with a CCD area image sensor, a linear polarizing plate, a microphase plate array, and a circularly polarized light illumination unit. In this system, the Stokes vector expressing the whole state of polarization is detected, and the influence of the background scattering in the retina and of the retardation caused by the cornea are numerically eliminated. The measurement method is based on the hypothesis that the retardation process of the eye optics can be quantified by a numerical equation that consists of a retardation matrix of all the polarization components. We show the method and the measurement results for normal eyes. Our results indicate that the present method may provide a useful means for the evaluation of retardation distribution of the RNFL.

©(2011) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Yasufumi Fukuma, Yoshio Okazaki, Takashi Shioiri, Yukio Iida, Hisao Kikuta, Motohiro Shirakashi, Kiyoshi Yaoeda, Haruki Abe, and Kazuhiko Ohnuma "Retinal nerve fiber layer retardation measurements using a polarization-sensitive fundus camera," Journal of Biomedical Optics 16(7), 076017 (1 July 2011). https://doi.org/10.1117/1.3600772

Published: 1 July 2011

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