Compositions and methods for disinfecting a contact lens and...

Details Compositions and methods for disinfecting a contact lens and... Compositions and methods for disinfecting a contact lens and...

A - Human Necessities

01

N

A01N 59/00 (2006.01) A61L 2/18 (2006.01) A61L 12/12 (2006.01)

Patent

CA 2225621

Compositions and methods useful for disinfecting a contact lens are disclosed. The present methods comprise contacting a contact lens with a liquid medium containing an effective amount of an oxidative disinfectant component at conditions to effectively disinfect the contact lens. The contacting occurs in the presence of a color indicator component which is soluble in the liquid medium and is adapted to provide a color indication of the presence of the oxidative disinfectant component in the liquid medium. The color indicator component comprises an effective amount of a transition metal component which is redox active, has an oxidized state of a first color and a reduced state of a different second color and a polyanionic component in an amount effective to inhibit the staining of the contact lens by the transition metal component.

L'invention porte sur des compositions et procédés servant à désinfecter des lentilles cornéennes. Lesdits procédés consistent à mettre en contact une lentille avec un liquide contenant une dose efficace d'un désinfectant oxydant dans des conditions propres à assurer la désinfection. Le contact s'opère en présence d'un marqueur de couleur soluble dans le liquide et conçu pour fournir une indication de couleur en présence du désinfectant oxydant. Ledit marqueur comporte une quantité efficace d'un métal de transition à activité redox d'une première couleur à l'état oxydé et d'une autre couleur à l'état réduit ainsi qu'un composant polyanionique en quantité suffisante pour empêcher le ternissement des lentilles par le métal de transition.

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