Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1995-01-10
1996-11-12
Epps, Georgia Y.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
G02C 704
Patent
active
055745180
ABSTRACT:
The first contact lens is placed on the dominating eye and includes a central spherical area for distance vision, which is surrounded by an annular non-spherical area having a diopter in the form of progressive addition which varies from zero addition at the inner periphery to a maximum addition at the outer periphery, and which enables vision, at all distances including reading. The second contact lens is placed on the dominated eye. The central area is spherical and adjusted for reading. The non-spherical annular area has a progressive reduction from maximum addition to zero addition, which enables vision from reading to intermediate and distance vision. This system provides in most cases 95-100% vision at all distances.
REFERENCES:
patent: 3950082 (1976-04-01), Volk
patent: 4418991 (1983-12-01), Breger
patent: 4869587 (1989-09-01), Breger
patent: 5002382 (1991-03-01), Seidner
patent: 5166712 (1992-11-01), Portney
patent: 5214453 (1993-05-01), Giovanzana
Mandell, Robert B; Contact Lens Practice-Hard and Flexible Lenses; Second Edition; 1974; pp. 651-655.
Epps Georgia Y.
Les Laboratoires Opti-Centre Inc.
Schwartz Jordan
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