Cleaning system for contact lenses and process for cleaning the same
AssigneeToray Industries, Inc.
InventorsHideki Kenjo, Teruo Jyono
Life of this patent
Estimating the term…
Abstract
A contact lens cleaning system, process and kit includes an aqueous chlorite solution and a solid component including an agent for accelerating decomposition of chlorite and an oxygen consumption agent. The chlorite decomposes to form free oxygen which removes impurities from a lens to be cleaned. The oxygen consuming agent prevents excess free oxygen from attacking the lens after the impurities have been removed.
Claims22
A cleaning system for contact lenses, comprising:
- (a) a chlorite salt in aqueous solution, capable of decomposition to form free oxygen for removing impurities from a contact lens;
- and
- (b) a solid component, comprising:
- an agent for accelerating the decomposition of the chlorite to form free oxygen, comprising at least one member selecting from the group consisting of acids and organic acid salts;
- an oxygen-consuming agent for consuming excess free oxygen from the decomposition of the chlorite after impurities have been removed from a contact lens being cleaned;
- and
- polyvinylpyrrolidone as a decomposition inhibitor for said agent for accelerating the decomposition of the chlorite.
A process for cleaning contact lenses, comprising placing a lens to be cleaned, and a cleaning system comprising:
- (a) a chlorite salt in aqueous solution, capable of decomposition to form free oxygen for removing impurities from a contact lens;
- and
- (b) a solid component, comprising:
- an agent for accelerating the decomposition of the chlorite to form free oxygen, comprising at least one member selected from the group consisting of acids and organic acid salts;
- an oxygen-consuming agent for consuming excess free oxygen from the decomposition of the chlorite after impurities have been removed from a contact lens being cleaned;
- and
- polyvinylpyrrolidone as a decomposition inhibitor for the agent for accelerating the decomposition of the chlorite in a vessel.
A cleaning system for contact lenses, comprising:
- (a) a chlorite salt in aqueous solution, capable of decomposition to form free oxygen for removing impurities from a contact lens;
- and
- (b) a solid component, comprising:
- an acid for accelerating decomposition of the chlorite to form free oxygen;
- a sugar for consuming excess free oxygen from the decomposition of the chlorite after impurities are removed from the lens;
- and
- polyvinylpyrrolidone as a decomposition inhibitor for the acid.
A process for cleaning contact lenses, comprising placing a lens to be cleaned and a cleaning system comprising:
- (a) a chlorite salt in aqueous solution, capable of decomposition to form free oxygen for removing impurities from a contact lens;
- and
- (b) a solid component, comprising:
- an acid for accelerating decomposition of the chlorite to form free oxygen;
- a sugar for consuming excess free oxygen from the decomposition of the chlorite after impurities are removed from the lens;
- and
- polyvinylpyrrolidone as a decomposition inhibitor for the acid in a vessel.
A contact lens cleaning kit, comprising:
- (a) a container with a chlorite salt in aqueous solution, capable of decomposition to form free oxygen for removing impurities from a contact lens;
- (b) a plurality of packages containing pre-measured amounts of:
- an agent for accelerating the decomposition of the chlorite to form free oxygen, comprising at least one member selected from the group consisiting of acids and organic acid salts
- an oxygen-consuming agent for consumming excess free oxygen from the decomposition of the chlorite after impurities have been removed from a contact lens being cleaned;
- and
- polyvinylpyrrolidone as a decomposition inhibitor for the agent for accelerating the decomposition of the chlorite;
- and
- (c) instructions for using the kit to clean a contact lens.
Dependencies are inferred from the claim text.