Apparatus for testing visual functions of human eyes

Details Apparatus for testing visual functions of human eyes Apparatus for testing visual functions of human eyes

1989-09-21

1991-09-10

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351224, 351243, A61B 314

Patent

active

050468359

ABSTRACT:
An automatic perimeter wherein the eye to be examined is maintained in a predetermined position to look at an eyepiece which focuses enlarged images of a series of stimuli on the retina. Stimuli are presented by a light emitting diode in combination with a diaphragm and are projected into selected locations around the optical axis of the eye. The perimeter operates without a cupola and is further provided with a system for illuminating the area in front of the eye as well as with a camera which images the eye onto the screen of a monitor so that the person in charge can ascertain whether or not the eye is focused upon a reference point on the optical axis of the eyepiece.

REFERENCES:
patent: 3536383 (1970-10-01), Cornsweet et al.
patent: 3718386 (1973-02-01), Lynn et al.
patent: 4021128 (1977-03-01), Regan
patent: 4265534 (1981-05-01), Remijan
patent: 4376573 (1983-03-01), Matsumura et al.

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