There is described a method for forming lenses having substantially no optical power. The method includes forming, via in situ polymerization, a layer of non-uniform thickness of an optically clear, high scratch-resistant polymeric material on the convex surface of the lens. The lenses provided by the...http://www.google.com.au/patents/US7042641?utm_source=gb-gplus-sharePatent US7042641 - Shaped plastic lenses and method for making the same
