HYDROGEL CONTACT LENS MADE OF STABLE POLYVINYL ALCOHOL AND MANUFACTURE THEREOF

摘要

PURPOSE: To produce a hydrogel contact lens of PVA with a mold whose dimensions are almost equal to those of a contact lens worn by a patient. CONSTITUTION: This hydrogel contact lens of PVA has about 70-80wt.% equilibrium water content and has been annealed for a sufficiently long time to attain to equilibrium in the presence of an annealing accelerating solvent in a mold for a contact lens.