Uv blocking lenses and material containing benzotriazoles...

Details Uv blocking lenses and material containing benzotriazoles... Uv blocking lenses and material containing benzotriazoles...

C - Chemistry, Metallurgy

08

K

C08K 5/3475 (2006.01) A61F 2/16 (2006.01) C08K 5/07 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2338245

A contact lens or intraocular lens with enhanced ultra violet (UV) blocking to meet ANSI Class 1 specifications is disclosed which includes enhanced effective amounts of two different UV absorbing compounds. One UV absorber is a benzotriazole derivative, and the other UV absorber is a benzophenone derivative. The lens can be made of a hydrogel polymer formed by polymerizing one or more: monomers suitable for making such lenses.

L'invention concerne des lentilles de contact ou des lentilles intra-occulaires permettant d'arrêter les rayonnements ultraviolets (UV), afin de répondre aux normes de catégorie I de l'ANSI, comprenant des quantités efficaces améliorées de deux composés absorbants d'UV différents. Un absorbeur d'UV est un dérivé de benzotriazole, l'autre absorbeur d'UV étant un dérivé de benzophénone. Les lentilles peuvent être fabriquées à partir d'un polymère d'hydrogel, formé par polymérisation d'un ou plusieurs monomères appropriés pour fabriquer ces lentilles.

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