Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1987-07-31
1990-01-09
Arnold, Bruce Y.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351175, G02B 2500, G02C 702
Patent
active
048923842
ABSTRACT:
A binocular magnifier which has a convex lens for the right eye retained in front of the right eye and a convex lens for the left eye retained in front of the left eye. The convex lens for the right eye is disposed eccentrically in such a manner that the optical axis of the lens is parallel to the visual axis of the right eye in the short-distance working region and located on the side of the visual axis of the right eye which is closer to the left eye. The convex lens for the left eye is disposed eccentrically in such a manner that the optical axis of the lens is parallel to the visual axis of the left eye in the short-distance working region and located on the side of the visual axis of the left eye which is closer to the right eye. The two convex lenses are spliced together in one unit at the median position between the right and left eyes. Accordingly, it is possible to obtain excellent binocular vision without any fear of the eyes becoming fatigue even when the magnifier is used for a long period of time.
REFERENCES:
patent: 439130 (1980-10-01), Edmunds
patent: 701788 (1902-06-01), Berger
patent: 1092769 (1914-04-01), Hubbell
patent: 1099404 (1944-06-01), Spery
patent: 1530240 (1925-03-01), Crawford
patent: 1636450 (1927-07-01), Ames, Jr.
patent: 4429951 (1984-02-01), Hirano
Adams et al., "Visual Performance and Optical Properties of Fresnel Membrane Prisms", American Journal of Optometry, vol. 48, Apr., 1971, No. 4, pp. 289-297.
Arnold Bruce Y.
Callaghan Terry S.
Kabushiki Kaisha AG
Zenjiro Okamoto
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