Tricurve optical metal master mold and method of making

Details Tricurve optical metal master mold and method of making Tricurve optical metal master mold and method of making

1985-07-29

1987-07-21

Lowe, James

Static molds

Container-type molding device

Of named component

82 1C, 249175, 264 11, 264 25, 425808, B27D 1100

Patent

active

046812954

ABSTRACT:
Spherical hydrophilic contact lenses having a characteristic tricurve configuration designed to correct myopia (nearsightedness) are described. The center zone (A1) of the lens is substantially thinner than the periphery (A3) allowing enhanced oxygen transmission and comfortable, increased wearing times while the thicker mid-periphery (A2) imparts necessary integrity and handling characteristics for convenience in manual manipulation. Lenses are molded or cast directly in the desired tricurve configuration using specially designed replica molds made from metal master molds.

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