Patent EP0175513A2 successfully refreshed from Google Patents.
Patent EP0601845A1 successfully refreshed from Google Patents.
EP0601845A1
Expired / Lapsed
EP
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Multifocal ophthalmic lens pair
Assignee: Johnson and Johnson Vision Care Inc
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Filing: 1993-12-08
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Granted: —
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Expires: 2013-12-08
Abstract
Abstract A pair of ophthalmic lenses both containing at least two optical powers, one for near vision and one for distance vision are described, both containing in the center portion of the lens the distance optical power. In the preferred embodiment, the remainder of the lens is comprised of annular portions made up of one or more optical zones to provide the desired combined, cumulative ratio of near and distance focal length areas at each pupil diameter. The distance portion located in the center is appropriately suited to the real world situation of requiring distance vision under high illumination situations.
Inventors
- 👤 Jeffrey H. Roffman
- 👤 Timothy R. Poling
- 👤 Michel Guillon
- 👤 Edgar Menezes
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 22:09
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/04; G02C7/041; G02C7/044; A; A61; A61F; A61F9/00; G02C7/024; G02C7/027; G02C7/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
114 words
A method of providing multifocal vision correction to a patient, said method comprising the steps of: determining the dominant eye of the patient, determining the near optical power required for the patient, determining the distance optical power required for the patient, providing the patient with a pair of lenses having optical surfaces, both lenses containing both the near optical power and the distance optical power with distance optical power at the center of both lenses, a dominant eye lens containing on the lens optical surface more than 50% of said determined distant optical power and a non-dominant eye lens containing on the lens optical surface more than 50% of said determined near optical power.
Claim 2
Dependent Claim
69 words
A pair of ophthalmic lenses having optical surfaces, both lenses containing both a near optical power and a distance optical power with distance optical power at the center of both lenses, one lens of said pair containing on the lens optical surface more than 50% said distant optical power and the other lens of said pair containing on the lens optical surface more than 50% said near optical power.
Claim 3
Dependent Claim
18 words
The lens of claim 2 wherein the lenses of said lens pair are of an annular, concentric construction.
Claim 4
Dependent Claim
27 words
The lens pair of claim 2 wherein between lenses the zones, exclusive of the center zone, have complementary placement of distance optical power and near optical power.
Claim 5
Dependent Claim
44 words
The lens pair of claim 2 further comprising an annular portion exterior said central portion containing more near optical power area than distant optical power area such that the total combined near and distance area of the central and annular portions are substantially equal.
References Cited (Backward Citations)
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