Ophthalmic glass of high refractive index

Details Ophthalmic glass of high refractive index Ophthalmic glass of high refractive index

1994-10-21

1996-08-20

Epps, Georgia Y.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351164, 351172, G02C 706

Patent

active

055483534

ABSTRACT:
The invention relates to a glass of high refractive index suitable for the close-vision part of multifocal, in particular phototropic multifocal, spectacle lenses. The glass has a composition (in % by weight, based on oxide) of:

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patent: 5190896 (1993-03-01), Pucilowski et al.
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