Method for making contact lenses

Details Method for making contact lenses Method for making contact lenses

G - Physics

02

B

G02B 1/04 (2006.01) B29D 11/00 (2006.01)

Patent

CA 2704018

Method and a fluid composition for producing contact lenses with improved lens quality and with increased product yield. The method of the invention involves adding a phospholipid into a fluid composition including a lens-forming material in an amount sufficient to reduce an averaged mold separation force by at least about 40% in companson with that without the phospholipids.

L'invention porte sur un procédé et sur une composition fluide pour produire des lentilles de contact ayant une qualité de lentille améliorée et un rendement de produit accru. Le procédé de l'invention met en jeu l'addition d'un phospholipide dans une composition fluide comprenant une matière de formation de lentille, dans une quantité suffisante pour réduire une force de séparation de moule moyenne d'au moins environ 40 % par comparaison avec celle sans les phospholipides.

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