A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 3/10 (2006.01) A61B 3/12 (2006.01)
Patent
CA 2333911
Apparatus is provided for determining the topography, thickness, and fiber orientation of the nerve fiber layer at the fundus of the eye (11) 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 (25) 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.
L'invention concerne un appareil pour déterminer la topographie, l'épaisseur et l'orientation des fibres de la couche de fibres nerveuses au niveau du fond de l'oeil (11), par la mesure du décalage de polarisation induit dans le faisceau de retour de la lumière polarisée réfléchie au niveau du fond de l'oeil à partir d'un faisceau incident se trouvant dans un état de polarisation connu. Un compensateur de polarisation cornéen (25) annule efficacement les effets biréfringents de la cornée et d'autre parties de l'oeil antérieures au fond, de sorte que des résultats cliniquement utilisables soient produits. L'invention porte aussi sur une méthode de mesure d'un faisceau envoyé dans l'oeil.
Gowling Lafleur Henderson Llp
Laser Diagnostic Technologies Inc.
LandOfFree
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