A - Human Necessities – 61 – L
Patent
A - Human Necessities
61
L
A61L 12/08 (2006.01)
Patent
CA 2292513
The present invention is directed to new and improved solutions for packaging contact lenses and to methods for treating contact lenses with such solutions to improve the comfort of the lenses during wear. In particular, the present invention is directed to packing solutions comprising certain non-ionic surfactants containing a poly(oxyalkylene) copolymer and having a molecular weight of 4000 to 30,000. Such surfactants are retained on the surface of an unused lens for extended periods of time, resulting in surface modification that persists in the eye, thereby providing significant improvement in the wetting properties of fresh contact lenses used for the first time and, moreover, even several hours after lens insertion, preventing dryness and improving lubricity.
La présente invention concerne de nouvelles solutions améliorées de conditionnement de lentilles de contact, et des procédés utilisant ces solutions pour traiter des lentilles de contact afin d'en améliorer le confort à l'usage. En particulier, l'invention concerne des solutions de conditionnement qui comprennent certains tensioactifs contenant un copolymère de poly(oxyalkylène) et présentant un poids moléculaire compris entre 4000 et 30000. Ces tensioactifs se maintiennent à la surface d'une lentille pendant des périodes prolongées, occasionnant ainsi une modification de surface qui persiste à l'oeil et apporte une amélioration considérable des propriétés d'humidification d'une lentille neuve portée pour la première fois, ou même plusieurs heures après sa pose, ce qui empêche la sécheresse des tensioactifs et améliore leur pouvoir lubrifiant.
Salpekar Anil
Tonge Stephen Ronald
Bausch & Lomb Incorporated
Osler Hoskin & Harcourt Llp
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