Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
Patent
1979-10-23
1982-01-12
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Folding
74501M, A61B 302, F16C 110
Patent
active
043102247
ABSTRACT:
A precisely movable mirror mount has a mirror pivotally supported on an elongated member. The member is rotationally supported by a support spaced along the member from the mirror, the support also supporting a winch. One end of a strand is windingly connected to the winch and the other end of the strand is connected to the mirror for rotating the mirror in one direction against a bias device which urges mirror rotation in the other direction. The strand mirror-rotating arrangement makes the device slim and thus visually non-distracting and the spacing to the member and winch support minimizes noise at the mirror to make the device audibly non-distracting, both of which are important to the preferred use of the device in a visual field tester in which the patient is close to the device.
REFERENCES:
patent: 4045130 (1977-08-01), Krahn
Coherent, The New Standard of Excellence in Visual Field Training, Perimetron Computerized Projection Perimeter, Sep. 1976.
Coherent, The Use of Computers to Automate Visual Field Exams is Resulting in Quicker More Complete Data Independent of Operator Skill, Perimetron, Aug. 1978.
Perkins Corles M.
Ragsdale Charles W.
Weilbach August
Bovernick Rodney B.
Cavitron Corporation
Corbin John K.
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