Binocular ophthalmoscope

Details Binocular ophthalmoscope Binocular ophthalmoscope

1981-05-19

1984-05-22

Corbin, John K.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

A61B 310

Patent

active

044497970

ABSTRACT:
In a binocular ophthalmoscope for indirect observation of an eye to be examined, having an observation unit and an illumination unit connected to the observation unit, wherein the observation unit deflects two closely spaced converging observation beams defining an observation plane with two first and two second mirrors to increase the beam spacing to the interpupillary distance of the observer's eyes. The two first mirrors are mounted closely together between the two second mirrors in a wedge and wherein the illumination unit includes a light source and a third mirror at the emergent side thereof which directs the light issuing from said light source along an illumination beam to the eye to be examined. The first two mirrors are mutually displaceable within the observation unit in the observation plane towards and away from the eyes of the observer to vary the convergence angle of the observation beams and the illumination beam is movable towards and away from said observation plane to vary the angle of the illumination beam with respect thereto.

REFERENCES:
patent: 3963329 (1976-06-01), Stumpf et al.

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