When the finished curve embodiment of the present invention is practiced, it is desirable to open the mold assembly in such a way that the front or back optical curve remains adhered to {HEAD ~ the mold surface}, exposing {TAIL ~ only the transitory surface} of the pre lens  
exposing
When the finished curve embodiment of the present invention is practiced , it is desirable to open the mold assembly in such a way that the front or back optical curve remains adhered to { HEAD ~ the mold surface } , exposing { TAIL ~ only the transitory surface } of the pre lens
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