Contact lens casting method

Details Contact lens casting method Contact lens casting method

B - Operations, Transporting

29

D

18/106

B29D 11/00 (2006.01)

Patent

CA 1112821

CONTACT LENS CASTING METHOD ABSTRACT OF THE DISCLOSURE Producing from a single contact lens casting mold, lenses of a number of different sizes by including in the casting precursor for each lens, a controlled amount of an extractable diluent of low volatility which is extracted after casting to cause the resulting lens to shrink a calculable amount. Variations in amounts are used to produce corresponding variations in sizes of cast and extracted lenses.

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