Plastic contact lens with magnetic embedded metal ring

Details Plastic contact lens with magnetic embedded metal ring Plastic contact lens with magnetic embedded metal ring

1975-04-23

1976-06-08

Dier, Philip

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 67, 1563031, 264 1, 351162, 351177, B29D 1100, B29D 300, G02C 704, G02C 706

Patent

active

039625052

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: 3034403 (1962-05-01), Neefe
patent: 3270099 (1966-08-01), Camp
patent: 3431327 (1969-03-01), Tsuetaki
patent: 3563057 (1971-02-01), Rosenbauer
patent: 3684357 (1972-08-01), Tsuetaki

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