Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Patent
1990-02-20
1991-06-18
Dzierzynski, Paul M.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Subjective type
351224, A61B 302
Patent
active
050245198
ABSTRACT:
Apparatus and method for visual-field testing. The apparatus includes an ocular device which fits over a subject's eye and which has a cavity-like inner surface dimensioned to encompass the subject's visual field. The ocular device is constructed to provide a background glow against which a fixed light image and a series of transient, different-position light image in the subject's visual field can be perceived. The images are preferably formed by a Badal-optical system which allows the images to be perceived without the need for corrective lenses. Also disclosed is a tandem-optics system for coordinately focusing fixed- and movable-position light image assemblies.
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Howard Dwight L.
Johnson Chris A.
Dehlinger Peter J.
Dzierzynski Paul M.
Regents of the University of California
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