Tricurve hydrophilic contact lens and process of molding same

Details Tricurve hydrophilic contact lens and process of molding same Tricurve hydrophilic contact lens and process of molding same

B - Operations, Transporting

29

D

88/40

B29D 11/00 (2006.01)

Patent

CA 1253368

ABSTRACT OF THE DISCLOSURE 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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