EP0147100A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Contact lenses
Assignee: Novartis AG
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Filing: 1984-12-05
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Granted: —
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Expires: 2004-12-05
Abstract
Abstract In a prophylactic method for cleaning and disinfecting a contact lens, the lens is contacted for an extended period, typically up to 10 hours, for example 5 to 10 hours, with a solution containing hydrogen peroxide. The contacting is effected in the presence of a solid sustained release composition which slowly liberates a peroxide inactivator and which maintains its integrity over the extended period. The solid composition liberates sufficient peroxide inactivator such that substantially no peroxide remains in contact with the lens at the end of the extended period. The lens may then be contacted with a contact lens wetting or comfort solution before insertion into the eye.
Inventors
- 👤 Brian Kay
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 01:21
CPC Classifications
A; A61; A61L; A61L12/00; A61L12/08; A61L12/12; A61L12/124; A01; A01N; A01N59/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
78 words
A method for cleaning and disinfecting a contact lens, wherein the lens is contacted for an extended period with a solution containing hydrogen peroxide, the contacting being effected in the presence of a solid, sustained-release composition which slowly liberates a peroxide inactivator and which maintains its integrity over the extended period, the solid composition acting to liberate sufficient peroxide inactivator such that substantially no peroxide remains in contact with the lens at the end of the extended period.
Claim 2
Independent Claim
78 words
A method for cleaning and disinfecting a contact lens, wherein the lens is contacted for an extended period with a solution containing hydrogen peroxide, the contacting being effected in the presence of a solid, sustained-release composition which slowly liberates a peroxide inactivator and which maintains its integrity over the extended period, the solid composition acting to liberate sufficient peroxide inactivator such that substantially no peroxide remains in contact with the lens at the end of the extended period.
Claim 3
Dependent Claim
15 words
A method according to claim 1, wherein the extended period is up to 10 hours.
Claim 4
Dependent Claim
23 words
--3. A method according to claim 1 or 2, wherein the hydrogen peroxide cleaning and disinfection solution contains 0.1 to 5% hydrogen peroxide.
Claim 5
Independent Claim
15 words
A method according to any preceding claim, wherein the hydrogen peroxide solution contains other components.
Claim 6
Independent Claim
23 words
A method according to any preceding claim, wherein the hydrogen peroxide solution is used at a level of 2 to 15ml per lens.
Claim 7
Dependent Claim
24 words
- A method according to any preceding claim, wherein the sustained-release composition is used at a level of 150 to 450 mg per lens.
Claim 8
Independent Claim
38 words
A method according to any preceding claim, wherein the sustained-release composition takes the form of a sustained release matrix containing as peroxide inactivator a reducing agent which is gradually leached out of the matrix over the extended period.
Claim 9
Dependent Claim
16 words
A method according to claim 7, wherein the sustained-release composition takes the form of a tablet.
Claim 10
Independent Claim
29 words
A method according to any preceding claim, wherein an indicator is included so that the user may visually determine that the end of the extended period has been reached.
Claim 11
Dependent Claim
38 words
A solid, sustained-release composition which slowly liberates a peroxide inactivator in hydrogen peroxide solution and which maintains its integrity over an extended period of up to 10 hours or more, the compositon taking the form of a tablet.
Claim 12
Dependent Claim
38 words
A solid, sustained-release composition which slowly liberates a peroxide inactivator in hydrogen peroxide solution and which maintains its integrity over an extended period of up to 10 hours or more, the compositon taking the form of a tablet.
References Cited (Backward Citations)
No citation records indexed.
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