Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1994-10-31
1996-06-11
Sikes, William L.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351205, A61B 300
Patent
active
055260748
ABSTRACT:
An indirect ophthalmoscopy lens system includes a contact lens device and a separate image erecting component. The contact lens device includes a first holder, a contact lens element having a concave posterior surface for placement on a cornea of a patient's eye and a first image forming lens system located anterior of the contact lens element and cooperating with the contact lens element for focussing light emanating from the retina of the patient's eye for forming a real, inverted, aerial image of the patient's retina anterior of the first image forming lens system. The first holder mounts the contact lens element and the first image forming lens system in a fixed relationship to one another. The image erecting component includes a second holder detached from the first holder and a second image forming lens system mounted within the second holder for receiving light rays forming the real inverted image anterior of the first image forming lens system for forming a real, re-inverted, aerial image of the patient's retina anterior of the second image forming lens system.
REFERENCES:
patent: 1848788 (1932-03-01), Loeck
patent: 4248506 (1981-02-01), Takahashi
patent: 4367018 (1983-01-01), Abe
patent: 4666268 (1987-05-01), Ito
patent: 4679921 (1987-07-01), Yamada
patent: 4721378 (1988-01-01), Volk
patent: 4753526 (1988-06-01), Koester
patent: 4856872 (1989-08-01), Spitznas et al.
patent: 4934809 (1990-06-01), Volk
patent: 4964717 (1990-10-01), Koester
patent: 5009487 (1991-04-01), Reiner
patent: 5046836 (1991-09-01), Volk
patent: 5200773 (1993-04-01), Volk
patent: 5282085 (1994-01-01), Volkert et al.
patent: 5359372 (1994-10-01), Kida et al.
patent: 5430506 (1995-07-01), Volk
Dudek James A.
Sikes William L.
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