Contact lens and method of making same

Details Contact lens and method of making same Contact lens and method of making same

1975-04-23

1978-01-31

Clark, Conrad J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

350162R, G02B 523

Patent

active

040712931

ABSTRACT:
A block of plastic is provided with a cylindrical well having an axial pillar in its inner portions over which an annular ferrous ring is mounted. A cylindrical plug is inserted in the well along with a mixture of solvent and powder of the same material as the block, heat and pressure are applied to meld the plug and the block with the ring embedded therein and the block is ground and polished to provide a resultant contact lens that can be removed from the eye of a wearer by a magnet. In another embodiment, the ring can be of various colors for cosmetic effect and can be non-concentric with respect to its axis to provide an offset center of gravity to provide a desired rotational positioning of the lens in the eye of a wearer when the lens is of bifocal or similar type.

REFERENCES:
patent: 3431327 (1969-03-01), Tsuetaki

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