Methods for disinfecting contact lenses with a manganese-coated disc, and related contact lens treatment systems
Contact lens treatment systems and methods for disinfecting contact lenses are described. These systems and methods utilize a coated catalytic disc, which contains a support disc and a manganese oxide present on at least a portion of the support disc. The coated catalytic disc contains 300 μg to 1800 μg of manganese, often in the form of manganese dioxide.
1. A method for disinfecting a contact lens, the method comprising:
immersing the contact lens in a volume of a disinfecting solution comprising from about 1.5 vol % to about 5 vol % H 2 O 2 in the presence of a coated catalytic disc comprising:
a support disc; and
a manganese oxide on at least a portion of the support disc;
wherein the coated catalytic disc comprises from about 300 μg to about 1800 μg of manganese.
2. The method of claim 1 , wherein the:
the contact lens is immersed for a time sufficient to reduce the H 2 O 2 concentration to less than 100 ppm; and
the volume of the disinfecting solution is from about 2 mL to about 20 mL.
3. The method of claim 1 , wherein the disinfecting solution comprises from about 2.5 vol % to about 3.5 vol. % H 2 O 2 .
4. The method of claim 1 , wherein the coated catalytic disc is characterized by:
a volume in a range from about 0.5 cc to about 1 cc;
a surface area in a range from about 2 cm 2 to about 20 cm 2 ;
a weight in a range from about 0.2 g to about 4 g;
a specific surface area in a range from about 1 cm 2 /g to about 20 cm 2 /g; and
from about 0.01 wt. % to about 0.3 wt. % manganese.
5. The method of claim 1 , wherein the coated catalytic disc is characterized by:
a volume in a range from about 0.6 cc to about 0.9 cc;
a surface area in a range from about 6 cm 2 to about 12 cm 2 ;
a weight in a range from about 0.5 g to about 1 g;
a specific surface area in a range from about 5 cm 2 /g to about 15 cm 2 /g; and
from about 0.05 wt. % to about 0.2 wt. % manganese.
6. The method of claim 1 , wherein:
the support disc comprises a polyamide, a polyphenylene oxide, a polyphenyl ether, a polypropylene, a polyethylene, a polystyrene, or any combination thereof;
the manganese oxide comprises manganese dioxide (MnO 2 ); and
the coated catalyst disc comprises from about 600 μg to about 1400 μg of manganese.
7. The method of claim 1 , wherein the coated catalytic disc contains from about 0.02 wt. % to about 0.2 wt. % manganese.
8. The method of claim 1 , wherein:
the disinfecting solution is configured to disinfect the contact lens; and
the coated catalytic disc is configured to neutralize the disinfecting solution.
9. A method for disinfecting a contact lens, the method comprising:
immersing the contact lens in a volume of a disinfecting solution comprising from about 1.5 vol % to about 5 vol % H 2 O 2 in the presence of a coated catalytic disc comprising:
a support disc comprising a polyamide, a polyphenylene oxide, a polyphenyl ether, a polypropylene, a polyethylene, a polystyrene, or any combination thereof; and
a manganese oxide on at least a portion of the support disc;
wherein the coated catalytic disc comprises from about 300 μg to about 1800 μg of manganese.
10. The method of claim 9 , wherein the coated catalytic disc contains from about 0.02 wt. % to about 0.2 wt. % manganese.
11. The method of claim 10 , wherein the support disc comprises a polyamide, a polyphenylene oxide, a polyphenyl ether, a polystyrene, or any combination thereof.
12. The method of claim 9 , wherein the coated catalyst disc comprises from about 600 μg to about 1400 μg of manganese.
13. The method of claim 9 , wherein the manganese oxide comprises manganese dioxide (MnO 2 ).
14. The method of claim 9 , wherein:
the contact lens is immersed for a time sufficient to reduce the H 2 O 2 concentration to less than 100 ppm; and
the volume of the disinfecting solution is from about 2 mL to about 20 mL; and
the disinfecting solution comprises from about 2.5 vol % to about 3.5 vol. % H 2 O 2 .
15. The method of claim 14 , wherein:
the disinfecting solution is configured to disinfect the contact lens; and
the coated catalytic disc is configured to neutralize the disinfecting solution.
16. The method of claim 9 , wherein the coated catalytic disc is characterized by:
a volume in a range from about 0.5 cc to about 1 cc;
a surface area in a range from about 2 cm 2 to about 20 cm 2 ;
a weight in a range from about 0.2 g to about 4 g; and
a specific surface area in a range from about 1 cm 2 /g to about 20 cm 2 /g.
17. The method of claim 9 , wherein the coated catalytic disc is characterized by:
a volume in a range from about 0.6 cc to about 0.9 cc;
a surface area in a range from about 6 cm 2 to about 12 cm 2 ;
a weight in a range from about 0.5 g to about 1 g; and
a specific surface area in a range from about 5 cm 2 /g to about 15 cm 2 /g.
18. The method of claim 9 , wherein:
the support disc comprises a polyamide, a polyphenylene oxide, a polyphenyl ether, a polystyrene, or any combination thereof; and
the coated catalytic disc contains from about 0.01 wt. % to about 0.3 wt. % manganese.
19. The method of claim 18 , wherein the coated catalytic disc contains from about 0.05 wt. % to about 0.2 wt. % manganese.
20. The method of claim 9 , wherein:
the support disc comprises a polyamide, a polyphenylene oxide, a polyphenyl ether, a polystyrene, or any combination thereof; and
the coated catalyst disc comprises from about 600 μg to about 1400 μg of manganese.