Ophthalmic measuring method and apparatus

Details Ophthalmic measuring method and apparatus Ophthalmic measuring method and apparatus

1989-10-25

1992-06-09

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351205, 128745, A61B 310, A61B

Patent

active

051201232

ABSTRACT:
Disclosed is an ophthalmic measuring method and aparatus in which an optical system is used to project a laser beam at a selected spot in camera oculi of the patient's eye to be examined, and the laser light scattered therefrom is detected for ophthalmic measurement. The light scattered from the selected spot is received by a photoelectric converter in at least two directions to derive signals representing the intensity of the scattered light in these directions. These signals are then compared to remove noise components, thereby providing an improvement in a S/N ratio.

REFERENCES:
patent: 4832043 (1989-05-01), Ichihashi
patent: 4854692 (1989-08-01), Kobayashi
patent: 4900144 (1990-02-01), Kobayashi

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