EP0201231A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of treating presbyopia with concentric bifocal contact lenses
Assignee: Cooper Companies Inc
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Filing: 1986-04-17
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Granted: —
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Expires: 2006-04-17
Abstract
Abstract Presbyopia is successfully alleviated in a person having binocular vision by a method wherein a concentric bifocal contact lens having a central distant vision zone and a peripheral near vision zone is fitted to one eye of the person and a second concentric bifocal contact lens having a central near vision zone and a peripheral distant vision is fitted to the other eye. The invention also comprises a kit containing a pair of concentric contact lenses, one lens having a central vision zone adapted to correct distant vision and a peripheral vision zone adapted to correct near vision, and the other of said lenses having a central vision zone adapted to correct near vision and a peripheral vision zone adapted to correct distant vision.
Inventors
- 👤 Brien A. Holden
- 👤 Arthur Back
- 👤 Ian Cox
- 👤 Arthur CCLRU Ho
- 👤 Grant Sayer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 02:47
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/04; G02C7/041; G02C7/044; G02C7/024; G02C7/027; G02C7/042
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
A method of correcting or alleviating presbyopia in humans having binocular vision, comprising (a) fitting a first contact lens to a first eye, said first contact lens having a first optical zone adapted to provide corrected near vision for said first eye and a second zone surrounding said first zone and adapted to provide corrected distant vision for said first eye and (b) fitting a second contact lens to the other eye, said second contact lens having a first optical zone adapted to provide corrected distant vision for said second eye and a second optical zone surrounding said first zone and adapted to provide corrected near vision for said second eye.
Claim 2
Independent Claim
111 words
A method of correcting or alleviating presbyopia in humans having binocular vision, comprising (a) fitting a first contact lens to a first eye, said first contact lens having a first optical zone adapted to provide corrected near vision for said first eye and a second zone surrounding said first zone and adapted to provide corrected distant vision for said first eye and (b) fitting a second contact lens to the other eye, said second contact lens having a first optical zone adapted to provide corrected distant vision for said second eye and a second optical zone surrounding said first zone and adapted to provide corrected near vision for said second eye.
Claim 3
Dependent Claim
60 words
A method according to claim 1 wherein the first optical zones of said first and second lenses are adapted under normal lighting conditions to cover a smaller percentage of the areas of the respective pupils than the second zones, whereby the near vision correction is dominant in said first eye and distant vision correction is dominant in said second eye.
Claim 4
Dependent Claim
21 words
A method according to claim 1 or claim 2 wherein said first zone is a zone centrally located in said lens.
Claim 5
Independent Claim
26 words
A method according to any one of the preceding claims wherein the second zone is an annular zone concentrically located with respect to said first zone.
Claim 6
Dependent Claim
24 words
A method according to claim 1 wherein a further zone adapted for correcting middle distance vision is located between the first and second zones.
Claim 7
Dependent Claim
122 words
A kit for treating presbyopia in humans comprising a first container containing a first contact lens, said first contact lens being a concentric bifocal contact lens having a central optic zone adapted to correct the near vision of a first eye of a presbyopic person and a peripheral optic zone adapted to correct the distant vision of said first eye, and a second container, either attached to said first container (or separate) and containing a second contact lens, said second contact lens being a concentric bifocal contact lens having a central optic zone adapted to correct the distance vision of a second eye of said person and a peripheral optic zone adapted to correct the said near vision of said second eye.
Claim 8
Dependent Claim
122 words
A kit for treating presbyopia in humans comprising a first container containing a first contact lens, said first contact lens being a concentric bifocal contact lens having a central optic zone adapted to correct the near vision of a first eye of a presbyopic person and a peripheral optic zone adapted to correct the distant vision of said first eye, and a second container, either attached to said first container (or separate) and containing a second contact lens, said second contact lens being a concentric bifocal contact lens having a central optic zone adapted to correct the distance vision of a second eye of said person and a peripheral optic zone adapted to correct the said near vision of said second eye.
Claim 9
Dependent Claim
64 words
A kit as claimed in claim 6 wherein the central optic zone of said first lens has greater positive (or less negative) optical power than said peripheral optic zone of power, and said central optic zone of said second lens has less positive (or greater negative) optical power than said peripheral optic zone of said second lens has more positive or less negative power.
Claim 10
Dependent Claim
83 words
The kit of claim 6 wherein said peripheral optic zone of said first contact lens has a positive optical power and said central optic zone has more positive optical power than that of said central optic zone of said first contact lens, and said central optic zone of said second contact lens has a positive optical power and said peripheral optic zone of said second contact lens has a greater positive optical power than said central optic zone of said second contact lens.
Claim 11
Dependent Claim
90 words
The kit of claim 6 wherein said peripheral optic zone of said first contact lens has a negative optical power and said central optic zone has a less negative (or positive) optical power than that of said central optic zone of said first contact lens, and said central optic zone of said second contact lens has a negative optical power and said peripheral optic zone of said second contact lens has a less negative (or positive) optical power than that of said central optic zone of said second contact lens.
References Cited (Backward Citations)
No citation records indexed.
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