Segmented multifocal contact lens and method of manufacture

Details Segmented multifocal contact lens and method of manufacture Segmented multifocal contact lens and method of manufacture

G - Physics

02

C

G02C 7/04 (2006.01) G02C 7/06 (2006.01)

Patent

CA 2073536

-25- A multifocal refractive lens to focus light on the retina of the eye and method of making. The lens is comprised of a plurality of segments, alternating segments having different optical powers. At least for distance vision and another for near. The lens of the invention does not require orientation to produce adequate for and near vision and normal steroscoptic effect. One or both of the segments having the optical powers may have aspherical lens surface. Preferably, the lens has at least one aspherical lens surface and the segments are divided by an arcuate path going from the center of the lens to edge. Such a lens is manufactured by taking lens molds and cutting the molds from the edge through the center to the opposite edge along a predetermined path. The molds are cut so that the segments produced are interchangable and can be fitted together to make a mold that can produce the multifocal refractive contact lens by molding.

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