Corning Incorporated

E Robert Fretz, Jr

David Dasher

Ronald E Johnson

Mark Stephen Friske

Anthony R Olszewski

John W Nelson

David J Kerko

Frederick E Noll

Nikki J Russo

Reba S Herndon

An improved, laminated, ophthalmic lens structure, and method of producing the structure. The structure comprises two adjacent layers of dissimilar, organic plastic materials, either or both of which contain matter that tends to migrate. The improvement comprises a barrier layer that is intermediate the adjacent organic plastic layers; that is impermeable to migrating matter; and that is composed of a polyolefin polymeric material modified by the presence of acid or anhydride functional groups.

Laminated ophthalmic lens

A method of producing a glass-plastic, laminated, ophthalmic lens structure in a continuous operation. A thin, flexible, plastic adhesive layer is applied to a glass element to form a composite body that is inserted in a cylindrical gasket in such manner as to fit snugly and be sealed from the ambient. A monomeric formulation is flowed onto the adhesive layer and cured to form a laminated lens blank.

Ophthalmic lens method

An ophthalmic lens embodying an organic plastic lens member having a refractive index of at least 1.56 and being the cured product of a monomeric formulation. The formulation contains a resin monomer base, a curing agent selected from aromatic anhydrides, aromatic diamines, thioamides and thioamines, and a refractive index enhancing additive selected from alkyl or aromatic diols or thiols and transition metal alkoxides. The organic plastic lens member may be an integral, monofocal lens, or a segment embedded in a cavity in the front, convex surface of an organic plastic, major lens member having a lesser refractive index. The latter may have a thin, inorganic glass lens member adhered to its front, convex surface to produce a glass-plastic, laminated, multifocal lens structure.

High-index, organic lens member

There is disclosed an improvement of the three layer laminated lens structure of U.S. Pat. No. 4,793,703 whereby the adhesive inerlayer is more tightly bonded to the outer plastic and glass layers by reactive groups on the surfaces of each layer. This controls a problem of delayed delamination.

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Corning, NY, United States of America

E Robert Fretz, Jr