Method and apparatus for discriminating eye fundus blood vessels

Details Method and apparatus for discriminating eye fundus blood vessels Method and apparatus for discriminating eye fundus blood vessels

1990-05-07

1992-08-25

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351221, 128666, A61B 310, A61B 502

Patent

active

051413035

ABSTRACT:
Light beams of predetermined different wavelengths are projected into an eye fundus and light scattered therefrom is detected to distinguish blood vessels from surrounding tissue in the eye fundus. The method and apparatus of the invention makes full use of differences in light absorbing/reflecting characteristics in the fundus blood vessels and surrounding tissue and is therefore able to reliably distinguish whether light projected at the eye fundus is scattered by a blood vessel or by surrounding tissue.

REFERENCES:
patent: 4157708 (1979-06-01), Imura
patent: 4854692 (1989-08-01), Kobayashi

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