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US 8,785,360 B1Granted
Method and system for color changing contact lens solution
OwnerIan Herrick, Heather Sheardown +3inventors
InventorsIan Herrick, Heather Sheardown, Lina Liu, Laura Anne Wells, Lyndon William James Jones
Life of this patent
Estimating the term…
Abstract
A used contact lens is placed in a contact lens receptacle. An aqueous composition is added to the contact lens receptacle, the aqueous composition capable of changing from a first appearance to a second appearance in response to an interaction with the used contact lens after a predetermined period of time.
Claims15
A method comprising:
- placing a used contact lens in a contact lens receptacle;
- and
- adding, from a liquid container, a color changing aqueous composition to the contact lens receptacle, the color changing aqueous composition being capable of changing from a first appearance to a second appearance in response to the color changing aqueous composition's interaction with the used contact lens after a predetermined period of time;
- wherein the aqueous composition includes a protein responsive dye comprising at least one of:
- a BCA dye (bichinchoninic acid and cupric ion), a Ninhydrin dye, and a bacterial dye.
2 more elements
A system for sanitizing a contact lens comprising:
- a liquid container;
- a color changing aqueous composition stored in the liquid container and having a first appearance;
- and
- a contact lens storage receptacle;
- wherein the color changing aqueous composition is applied to the used contact lens in the contact lens storage receptacle, and wherein the color changing aqueous composition is configured to change from the first appearance to a second appearance when applied to the used contact lens for a predetermined period of time;
- wherein the aqueous composition includes a protein responsive dye comprising at least one of:
- a BCA dye (bichinchoninic acid and cupric ion), a Ninhydrin dye, and a bacterial dye.
4 more elements
An aqueous composition comprising:
- an ophthalmic contact lens cleaning solution;
- a protein responsive dye reactive to deposits on a used contact lens;
- wherein a reaction between the protein responsive dye and the deposits cause the aqueous composition to change from the first appearance to a second appearance when applied to the used contact lens for a predetermined period of time;
- wherein the aqueous composition includes a protein responsive dye comprising at least one of:
- a BCA dye (bichinchoninic acid and cupric ion), a Ninhydrin dye, and a bacterial dye.
2 more elements
Dependencies are inferred from the claim text.