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Journal of Biomedical Optics

Coherent optical techniques for diagnostics of retinal blood flow
Author(s): Yoshihisa Aizu; Toshimitsu Asakura
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Paper Abstract

Up to now, a variety of coherent optical techniques have been proposed and extensively studied for diagnostics of the retinal blood flow. These techniques are mainly based on dynamic laser light-scattering phenomena such as the laser Doppler effect and the laser speckle fluctuation. This paper reviews, first, spectral reflectance properties of the ocular fundus tissue layers and, then, principles of the techniques with the comparison of the Doppler and the speckle methods. Some physical phenomena are also discussed in the origin of the techniques such as heterodyne and homodyne beatings, and time-varying speckles. Developing processes of each technique are briefly outlined. Peculiarities of blood flow measurements at the retina are finally examined from the methodological point of view.

Paper Details

Date Published: 1 January 1999
PDF: 15 pages
J. Biomed. Opt. 4(1) doi: 10.1117/1.429922
Published in: Journal of Biomedical Optics Volume 4, Issue 1
Show Author Affiliations
Yoshihisa Aizu, Muroran Institute of Technology (Japan)
Toshimitsu Asakura, Hokkai-Gakuen Univ. (Japan)


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