Eye test apparatus with physician routed patient input adjustmen

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding

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Details

351 18, 351 26, 351 30, A61B 302

Patent

active

040158993

ABSTRACT:
Corrective optics having continuously variable spherical, astigmatic, and prismatic functions are placed in a light path between a viewing patient and a projected target. Typically, the target is projected by a projector preferably through focusing optics in the form of a field mirror. The focusing optics serve the dual purpose of relaying to the patient the image of the target as well as focusing to the patient's eyeglass position a real image of the corrective optics. A patient has a patient input, typically a hand wheel, at or near his patient viewing station. The patient uses this input to vary the setting of the corrective optics. The eye examiner, at an adjacent eye examination station, is provided with a gear box having a clutch mechanism. The gear box includes examiner inputs for astigmatic and spherical correction to each eye as well as prismatic correction for both eyes. Through use of the clutch mechanism, the patient input at the patient viewing station can be routed individually or collectively to the various spherical, astigmatic, and prismatic corrections for either or both eyes. By utilizing specialized aligned targets and following simplified examiner instructions, direct patient input from the hand of the patient on the patient hand wheel into the variable spherical, astigmatic and prismatic optics is possible. Such input is specifically routed by the examiner to greatly decrease the time necessary for complete examination and eliminate much communication required for examination.

REFERENCES:
patent: 3737217 (1973-06-01), Haines et al.
patent: 3874774 (1975-04-01), Humphrey
patent: 3905688 (1975-09-01), Decker et al.

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