Junctionless ophthalmic lenses and methods for making same

Details Junctionless ophthalmic lenses and methods for making same Junctionless ophthalmic lenses and methods for making same

G - Physics

02

C

G02C 7/04 (2006.01) A61B 18/18 (2006.01) A61F 2/16 (2006.01) A61F 9/01 (2006.01) B29D 11/00 (2006.01)

Patent

CA 2428506

Methods for producing a junctionless ophthalmic lens are provided. Additionally, ophthalmic lenses having Functionless, three dimensional surfaces, for example, asymmetrical anterior (18) and/or posterior (14) surfaces, as well as molding tools used in the production of such lenses, are also provided. The method generally include providing sample data points to define a surface contour, and interpolating between these data points using an algorithm to produce a simulated three dimensional surface. The simulated three dimensional surface is used in producing an ophthalmic lens, for example, in cast molding a contact lens (10).

L'invention concerne des procédés de fabrication d'une lentille ophtalmique sans raccord. L'invention concerne également des lentilles ophtalmiques présentant des surfaces sans raccord et tridimensionnelles, par exemple, des surfaces antérieures et/ou postérieures asymétriques, ainsi que des outils de moulage utilisés pour la fabrication de telles lentilles. Le procédé consiste, de manière générale, à utiliser des points de données d'un échantillon, en vue de définir un contour de surface et à interpoler entre ces points de données au moyen d'un algorithme, de manière à obtenir une surface tridimensionnelle simulée. Celle-ci est utilisée dans la fabrication d'une lentille ophtalmique, par exemple, dans le moulage par coulée d'une lentille de contact.

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