Multifocal lenses and method of making same

Details Multifocal lenses and method of making same Multifocal lenses and method of making same

G - Physics

02

C

88/42

G02C 7/06 (2006.01) B24B 13/00 (2006.01) B29D 11/00 (2006.01) C03B 11/08 (2006.01) C03B 17/02 (2006.01) C03B 23/03 (2006.01) C03B 23/22 (2006.01) B29C 43/00 (2006.01)

Patent

CA 1044930

MULTIFOCAL LENSES AND METHOD OF MAKING SAME Abstract of the Disclosure A multifocal lens formed of laminated high and relatively low index thermoplastic ophthalmic lens materials. A flat laminate is slumped, pressed or otherwise formed to a spherically or aspherically meniscus shape so as to similarly shape the high- low refractive index interface of the laminate. Ocular and object surfaces of the multifocal lens are ground to preselected spherical and/or toric curvatures disposed in predetermined angular relationships and proximities to the interface and to each other according to particular multifocusing properties desired of the lens. Polishing of the surfaces and edging of the lens to a desired peripheral configuration completes the product.

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