Subjective ophthalmic instrument

Details Subjective ophthalmic instrument Subjective ophthalmic instrument

1985-10-02

1988-04-26

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351211, A61B 310, A61B 314

Patent

active

047400714

ABSTRACT:
A subjective ophthalmic instrument has optotypes which are observed by the patient through a correcting lens system of adjustable refractive power. The subjective ophthalmic instrument further has a optotype examination system which includes an imaging optical system for producing an image of a patient's fundus projected with an image of the optotypes at a camera tube, and display means for displaying the optotype image in accordance with the output of the camera tube.

REFERENCES:
patent: 4279478 (1981-07-01), Matsumura
patent: 4283126 (1981-08-01), Reiner

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