Binocular ophthalmoscope

Details Binocular ophthalmoscope Binocular ophthalmoscope

1984-03-26

1986-02-04

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

350145, A61B 310, G02B 2702

Patent

active

045681589

ABSTRACT:
A binocular ophthalmoscope having two horizontally displaceable deflecting mirrors in the ray paths from the two eyes of the observer to the pupil of the eye being examined, and a vertically displaceable and also tiltable mirror in the beam path from a source of illumination to the pupil of the eye being examined. Movement of the horizontally displaceable mirrors toward or away from each other varies the stereoscopic base of observation. Vertical displacement and tilting of the other mirror serves to vary the location where the illuminating beam enters the pupil relative to the location where the rays from the eyes of the observer enter the pupil of the eye being examined. The mechanism for vertically moving and tilting the third mirror is coupled to the mechanism for moving the two horizontally displaceable mirrors, enabling the adjustments to be performed from a single manually operable adjusting knob, more easily and conveniently than in prior arrangements where successive operation of two adjusting members may be required.

REFERENCES:
patent: 2757574 (1956-08-01), Thorburn
patent: 3582191 (1971-06-01), Cohen et al.
patent: 3963329 (1976-06-01), Stumpf et al.

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