A plastic mold assembly comprising a male and female section for casting soft contact lenses from a polymerizable feed material wherein compensation for polymerization shrinkage is attained and disengagement of the male and female mold sections is facilitated by providing one flexible and one rigid mold...http://www.google.de/patents/US4565348?utm_source=gb-gplus-sharePatent US4565348 - Mold for making contact lenses, the male mold member being more flexible than the female mold member
