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)

Patent

CA 2533304

Methods for producing a junctionless ophthalmic lens are provided. Additionally, ophthalmic lenses having junctionless, three dimensional surfaces, for example, asymmetrical anterior and/or posterior 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) for use on a cornea (12) of a user.

La présente invention a trait à des procédés de fabrication d'une lentille ophtalmologique sans jonctions. L'invention a également trait à des lentilles ophtalmologiques sans jonctions, à surfaces tridimensionnelles, par exemple, à surfaces antérieure et/ou postérieure asymétriques, ainsi que des outils de moulage utilisés dans la production de telles lentilles. De manière générale, le procédé comprend la mise à disposition de points de données d'échantillons pour la définition d'un contour de surface, et l'interpolation entre ces points de données au moyen d'un algorithme pour produire une surface tridimensionnelle simulée. La surface tridimensionnelle simulée est utilisée dans la production d'une lentille ophtalmologique, par exemple, dans le moulage d'une lentille de contact.

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