Ophthalmic lens wafers for forming a composite lens are provided wherein each front lens wafer has a front registration pattern formed on its peripheral edge, and each back lens wafer has a back registration pattern formed on its peripheral edge which is different than the front registration...http://www.google.fr/patents/US5808721?utm_source=gb-gplus-shareBrevet US5808721 - Ophthalmic lens wafers and receiver for registering such wafers
Ophthalmic lens wafers and receiver for registering such wafers
