Contact lens extraction/hydration systems and methods of...

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 3/00 (2006.01)

Patent

CA 2618621

The present contact lens treating systems and methods effectively remove extractable materials from contact lenses, for example, newly formed contact lenses, so that the lenses can be safely and conveniently worn, for example, for extended periods of time. Such treatment methods and the present extraction medium reprocessing methods allow lens treatment while reducing extraction medium losses. The present methods can also be useful for manufacturing a heat stabilized contact lens, for example, a water swelled contact lens including a Vitamin E component which is insoluble in the lens in a hydrated state.

Les systèmes et procédés de traitement de lentilles de contact de l'invention permettent de retirer efficacement les matières extractibles à partir de lentilles de contact, par exemple, de lentilles de contact nouvellement formées, de sorte que les lentilles peuvent être portées de manière sûre et pratique, par exemple, sur des durées prolongées. Lesdits procédés de traitement et les procédés de retraitement de milieu d'extraction de l'invention permettent le traitement des lentilles tout en réduisant les pertes de milieu d'extraction. Les procédés de l'invention peuvent également être utiles pour fabriquer une lentille de contact thermostabilisée, par exemple, une lentille de contact gonflée à l'eau comprenant un composé de vitamine E qui est insoluble dans la lentille dans un état hydraté.

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