Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1986-11-04
1988-04-26
Terapane, John F.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
350311, 350438, 351159, 252589, G02C 702, G02B 522
Patent
active
047400706
ABSTRACT:
Polyol(allyl carbonate) monomer, e.g., diethylene glycol bis(allyl carbonate), containing 1,4-dihydroxy anthraquinone in amounts sufficient to selectively absorb at least 94 percent of the visible and ultraviolet light segments of the electromagnetic spectrum below 530 nanometers is described. Also described are ophthalmic articles prepared by curing the monomer.
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Colour Index, vol. 4, p. 4515, 3rd Ed. (1971).
Kilby Catherine S.
PPG Industries Inc.
Stein Irwin M.
Terapane John F.
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