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Proceedings Paper

In-vivo measurement of the retinal birefringence with regard to corneal effects using an electro-optical ellipsometer
Author(s): Bernhard C. E. Pelz; Christian Weschenmoser; Stefan Goelz; Joerg P. Fischer; Reinhard O. W. Burk; Josef F. Bille
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Paper Abstract

The phase retardation of light induced by the birefringent parts of the human retina in vivo is measured with an electro-optical ellipsometer using the principle of confocal imaging. A scanning unit allows to examine an area of 25 degrees by 12.5 degrees on the retina with a resolution of 256 by 128 points with both, incident and exit beam transmitting the cornea at a fixed position. Due to this fixed beam position the Muellermatrix of the cornea can be calculated using light which is specularly reflected on blood vessels lying above the nerve fiber layer of the retina. The obtained images show a homogenous radial distribution of the retinal retardation around the fovea without the appearance of the so called Haidinger brushes. The areas with the thickest nerve fiber layers, the arcuate bundles, appear in their typical arc and were measured quantitatively. In addition, an alternative method for the compensation of corneal birefringence is evaluated by focusing the light beam onto the surface of the lens. Hereby, the measured area in the center of the cornea is 3 X 0.75 mm2.

Paper Details

Date Published: 5 December 1996
PDF: 10 pages
Proc. SPIE 2930, Lasers in Ophthalmology IV, (5 December 1996); doi: 10.1117/12.260860
Show Author Affiliations
Bernhard C. E. Pelz, Univ. of Heidelberg (Germany)
Christian Weschenmoser, Univ. of Heidelberg (Germany)
Stefan Goelz, Univ. of Heidelberg (Germany)
Joerg P. Fischer, Univ. of Heidelberg (Germany)
Reinhard O. W. Burk, Eye Clinic/Univ. of Heidelberg (Germany)
Josef F. Bille, Univ. of Heidelberg (Germany)

Published in SPIE Proceedings Vol. 2930:
Lasers in Ophthalmology IV
Reginald Birngruber; Adolf Friedrich Fercher; Philippe Sourdille M.D., Editor(s)

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