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Application filed by Pilkington Visioncare IncfiledCriticalPilkington Visioncare Inc
Priority to MX9206842ApriorityCriticalpatent/MX9206842A/en
Publication of MX9206842ApublicationCriticalpatent/MX9206842A/en
Casting Or Compression Moulding Of Plastics Or The Like
(AREA)
Abstract
La invención se refiere a un procedimiento para producción de lentes bifocales poliméricos que incluye las etapas de elegir una preforma de lente o lentes de visión simple con una superficie convexa, y un molde bifocal con un radio menor de curvatura; erosionar suavemente la superficie convexa de la preforma de lente o lente; ensamblar el molde y la preforma de lente o lente, con monómero catalizado entre el molde y la preforma de lente o lente; sostener la preforma de lente o lente y el molde en posición entre sí, de manera tal que la preforma de lente o lente contacto al molde.The invention relates to a method of producing polymeric bifocal lenses that includes the steps of choosing a single vision lens or lens preform with a convex surface, and a bifocal mold with a smaller radius of curvature; Gently erode the convex surface of the lens or lens preform; assembling the mold and the lens or lens preform, with catalyzed monomer between the mold and the lens or lens preform; holding the lens or lens preform and the mold in position with each other, such that the lens or lens preform contacts the mold.
MX9206842A1992-11-271992-11-27
PROCEDURE FOR THE PRODUCTION OF POLYMERIC BIFOCAL LENSES.
MX9206842A
(en)
Method of mutually positioning a pair of shaping-tool halves facing each other and shaping tool for the manufacture of precision-made articles in particular contact lenses