Eye examination apparatus employing polarized light probe

Details Eye examination apparatus employing polarized light probe Eye examination apparatus employing polarized light probe

1998-06-04

2000-08-29

Smith, Ruth S.

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

600558, 351215, 351221, A61B 310

Patent

active

061121142

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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