Method and apparatus for manufacturing contact lens

Details Method and apparatus for manufacturing contact lens Method and apparatus for manufacturing contact lens

1989-09-14

1991-01-01

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51 5C, 511255, 51154, 51284E, B24B 4900, B24B 4902, B24B 4903

Patent

active

049809938

ABSTRACT:
A method for manufacturing a contact lens from contact lens raw material to a desired shape and an apparatus for carrying out the method by forming a base curve and bevel in accordance with design data. The radius of curvature of the base curve is measured and the radius of curvature data of a front curve for forming a contact lens having a desired power is calculated. The front curve together with a lentic curve, if required, is formed based upon the calculated shape data. A soft abrasive cloth is pressed against the work contact lens by fluid pressure while causing relative motion therebetween to polish the contact lens.

REFERENCES:
patent: 3874124 (1975-04-01), Morgan et al.
patent: 4434581 (1984-03-01), Spriggs
patent: 4455901 (1984-06-01), Council, Jr.
patent: 4460275 (1984-07-01), Spriggs
patent: 4787732 (1988-11-01), Siviglia

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