Process for hydrating soft contact lenses

Details Process for hydrating soft contact lenses Process for hydrating soft contact lenses

B - Operations, Transporting

44

C

149/13

B44C 1/22 (2006.01) B29D 11/00 (2006.01) G02B 1/04 (2006.01) G02C 13/00 (2006.01)

Patent

CA 2040520

A process for releasing leachable substances from a polymeric contact lens blank. The contact lens is confined in a cavity within a carrier to permit the hydration of the lens without permitting it to invert or roll over. A fluid flow is introduced into the cavity about the lens to extract leachable material from the lens. The process significantly reduces the amount of leaching fluid that is used and the amount of time that is needed for hydration, washing and extraction.

Processus pour libérer des substances lessivables d'une ébauche polymère de lentilles de contact. La lentille de contact est confinée dans une cavité d'un transporteur pour permettre de l'hydrater sans qu'elle roule ni s'inverse. Un écoulement fluide est introduit dans la cavité autour de la lentille afin d'extraire les matières lessivables dans cette dernière. Le processus réduit considérablement la quantité de liquide de lessivage utilisé et le temps nécessaire pour l'hydratation, le lavage et l'extraction.

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