Patent ID: 7854866
Filing Date: 2010-12-21
Classification: B29C,B29D,B29L

Abstract:
1. A method of forming contact lenses by polymerizing contact lens precursor materials in molds, wherein the method comprises the following steps: providing contact lens precursor materials in molds, providing an oven, providing an inert atmosphere in the oven, and heating the molds in the oven to utilize only thermal radiation to polymerize the contact lens precursor materials in the molds to form polymerized molded contact lenses by: maintaining the molds at a first temperature in a first zone of the oven, moving said molds from the first zone to a second zone of the oven, wherein the first zone is at least partially separated from the second zone by a wall which acts to restrict heat flow between the first zone and the second zone; and maintaining the molds in the second zone at a second temperature, different from the first temperature.