Eye examination apparatus employing polarized light probe
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United States of America Patent
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app pub date -
Dec 29, 2001
filing date -
Apr 18, 1994
priority date (Note) -
Abandoned
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Abstract
Apparatus is provided for determining the topography, thickness, and fiber orientation of the nerve fiber layer at the fundus of the eye by measuring the polarization shift induced in a return beam of polarized light which is reflected at the ocular fundus from an incident beam of a known polarization state. A corneal polarization compensator effectively cancels the birefringent effects of the cornea and other portions of the eye anterior to the fundus, so that clinically meaningful results are produced. A method for directing a measurement beam into the eye is also disclosed.
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