The effect of polymethylmethacrylate, silicone, and polyacrylic intraocular lenses on posterior capsular opacification 3 years after cataract surgery11The authors have no proprietary interest in the products described in this article. - Hollick, Emma J; Spalton, David J; Ursell, Paul G; Pande, Milind V; Barman, Sarah A; Boyce, James F; Tilling, Kate (Ophthalmology ; volume 106, issue 1, page 49-55 ; ISSN 0161-6420, 1999)