Hydrogen peroxide disinfecting system for contact lenses

Details Hydrogen peroxide disinfecting system for contact lenses Hydrogen peroxide disinfecting system for contact lenses

1985-09-27

1989-11-14

Richman, Barry S.

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Using disinfecting or sterilizing substance

422 30, 422292, 424616, 514840, A61L 216

Patent

active

048806013

ABSTRACT:
A system and method for disinfecting contact lenses with a stabilized hydrogen peroxide solution and a separate neutralizing solution are described. Sodium stannate (a.k.a. sodium tin oxide) is utilized to stabilize the hydrogen peroxide, and sodium thiosulfate is utilized to neutralize the hydrogen peroxide. In addition to sodium thiosulfate, the neutralizing solution also contains a complexing agent capable of sequestering tin, such as EDTA or EGTA. The system and method provide improvements over prior hydrogen peroxide disinfection systems with respect to stability, predictability and rate of reaction.

REFERENCES:
patent: 3912451 (1975-10-01), Gaglia, Jr.
patent: 4521375 (1985-06-01), Houlsby
patent: 4568517 (1986-02-01), Kaspar et al.
patent: 4812173 (1989-03-01), Tsao et al.
Gasset et al., "Hydrogen Peroxide Sterilization of Hydrophilic Contact Lenses", Arch Ophthalmol., vol. 93, pp. 412-415, Jun. (1975).

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