Patent ID: 6899831

Claim:
An method of preparing an eyeglass lens in a lens forming apparatus, the lens forming apparatus, comprising: a first lens curing unit comprising a first activating light source, wherein the first lens curing unit is configured to produce activating light directed toward a mold assembly during use; a second lens curing unit comprising a second activating light source and heating system, wherein the second activating light source is configured to direct activating light toward a mold assembly during use; and wherein the heating system is configured to heat the interior of the second lens curing unit; a first conveyor system configured to convey the mold assembly through the first lens curing unit, the first conveyor system operable at varying speeds; a second conveyor system configured to convey the mold assembly through the second lens curing unit; wherein the method comprises: placing a first mold assembly filled with a first lens forming composition in a first mold assembly holder, the first mold assembly holder comprising a body and an indentation formed in the body, wherein the indentation is complementary to the shape of the mold assembly; placing the first mold assembly holder in the first lens curing unit; initiating curing of the first lens forming composition by applying activating light to the first mold assembly; advancing the first mold assembly holder to the second curing unit; placing a second mold assembly filled with a second lens forming composition in a second mold assembly holder, the second mold assembly holder comprising a body and an indentation formed in the body, wherein the indentation is complementary to the shape of the mold assembly; initiating curing of the second lens forming composition by applying activating light to the second mold assembly, wherein the second activating light is applied at a time based on the position of the first mold assembly holder in the second curing unit; advancing the second mold assembly holder to the second curing unit curing the first and second lens forming compositions disposed in the mold assembly holders in the second lens curing unit to form a first and second eyeglass lenses.