Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Patent
1995-04-17
1996-10-22
Sikes, William L.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Subjective type
351244, 351246, 351239, A61B 302
Patent
active
055682090
ABSTRACT:
A lightweight, pocket-sized, hand-held near vision test apparatus that selectively retroilluminates different near vision test objects located on an interchangeable near vision test card, or alternatively, selectively displays near vision test objects on a flat panel display screen. The apparatus allows the examiner to electronically direct the patient's attention to selected near vision test objects, while providing a baseline amount of contrast illumination.
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Cutler Maxwell
Priester William B.
Dudek James A.
Sikes William L.
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