PMMA, polymethyl-methacrylate, is a thermoplastic acrylic linear polymer, the mer of which is illustrated in the diagram. PMMA is transparent, with a refractive index of 1.49, and easily formed into ...

Although it is extremely rare and uncommon, damage can occur to a polymethyl-methacrylate (PMMA) or a foldable acrylic IOL during implantation. One-piece or threepiece clear PMMA IOLs are ...