Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1991-04-08
1993-06-29
Sugarman, Scott J.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351164, 351172, G02C 706, G02C 710
Patent
active
052238628
ABSTRACT:
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.
REFERENCES:
patent: 4268134 (1981-05-01), Gulati et al.
Dasher David
Fretz, Jr. E. Robert
Nelson John W.
Olszewski Anthony R.
Corning Incorporated
Janes Jr. Clinton S.
Peterson Milton M.
Sugarman Scott J.
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