Method of making contact lens blanks

Details Method of making contact lens blanks Method of making contact lens blanks

1983-02-15

1984-07-03

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264 23, 264 27, 264 39, 4251742, 425808, B29D 1100

Patent

active

044578806

ABSTRACT:
A lens blank having a finished optical surface is cast from a liquid monomer beneath an optical surfaced mold made from a resinous material which adheres to the polymerized lens material. The lower mold having a non-optical surface is made from a resinous material which will not adhere to the polymerized solid lens material. Ultra sonic vibrations are used to dislodge and clean particulate matter from the optical mold before polymerization of the liquid lens monomer.

REFERENCES:
patent: 2890486 (1959-06-01), Crandon
patent: 3361858 (1968-01-01), Wichterle
patent: 4155962 (1979-05-01), Neefe
patent: 4159292 (1979-06-01), Neefe
patent: 4197266 (1980-04-01), Clark
patent: 4209289 (1980-06-01), Newcomb

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