B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
B29D 11/00 (2006.01) G02C 7/02 (2006.01) G02C 7/04 (2006.01)
Patent
CA 2274848
A method of forming a contact lens (22) containing a colored ring (24) that covers a portion of or the entire limbus area of the eye when the contact lens is worn. The method of forming the contact lens (22) includes applying a colorant material (12) in a limbal ring pattern (24) to the surface (14) of a one-sided contact lens mold (10), then filling the one-sided contact lens mold (10) with a polymerizable substance (16), casting the substance thereby forming a molded surface (26) containing a limbal ring pattern (24), and machining the opposite side (20), thereby creating a finished side opposite the molded surface (26).
On décrit un procédé de fabrication d'une lentille de contact conentenant un anneau de couleur qui recouvre une partie ou la totalité de la zone limbique de l'oeil lorsque la lentille est en place. Le procédé de fabrication consiste à appliquer une matière colorante, en forme d'anneau limbique, sur la surface d'un moule de lentille de contact à un côté, puis à remplir ledit moule d'une substance polymérisable, à procéder au moulage de la substance pour obtenir ainsi une surface moulée contenant une forme d'anneau limbique, puis à usiner le côté opposé pour créer un côté fini situé à l'opposé de la surface moulée.
Jahnke Richard L.
Lawrence Chapoy L.
Fetherstonhaugh & Co.
Novartis Ag
Wesley Jessen Corporation
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