BUSINESS: International News Rapid 3D Printing of Lenses By Staff Wednesday, May 16, 2018 12:25 AM A method of using a 3D printer to rapidly create small aspheric lenses offers new possibilities for manufacturing customized contact lenses and optical imaging lenses. Developed by a team at Northwestern University Engineering, the layer-by-layer 3D printing technique is capable of creating a 5 mm in diameter lens in about four hours. Read More.