Patents review: some recent patents on ophthalmic lenses.
D005139:Eyeglasses; D005898:Glass; D010330:Patents as Topic; D010969:Plastics; D011092:Polyethylene Glycols; D012031:Refractometry; D006113:United Kingdom; D014481:United States
D010969:Plastics; C028827:CR 39; D011092:Polyethylene Glycols