Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1996-03-21
1998-07-14
Dang, Hung X.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351205, A61B 310
Patent
active
057812756
ABSTRACT:
An eye refractometer includes a beam splitter arranged in front of an eye to be examined for splitting an optical path from the eye to be examined into an optical path for eye observing and an optical path for eye refracting, an eye observing optical system for observing the eye to be examined from a direction oblique to the viewing direction of the eye to be examined with a magnifying optical system by way of the beam splitter, and an eye refracting system for electro-optically measuring the refractive power of the eye to be examined by projecting and receiving a light beam by way of the beam splitter.
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Canon Kabushiki Kaisha
Dang Hung X.
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