| abstract |
Polymeric and co-polymeric compositions useful for preparing ophthalmic and ocular devices, such as implantable intraocular lenses (IOL) and contact lenses, and processes of forming the compositions and devices are provided. The disclosed polymeric or co-polymeric composition may include a curcuminoid compound as a UV- blocker, and is derived from a pre-polymerization mixture of monomers which comprises at least 50 weight percents acrylate monomers and exhibiting visible light transparency and ultraviolet light opacity. The disclosed co-polymeric composition may alternatively, or in addition, be derived from a pre-polymerization mixture of monomers including 50 % to 60 % of a first aromatic acrylate monomer, characterized as forming a homopolymer having a refractive index that ranges from 1.50 to 1.53; 15 % to 20 % of a second aromatic acrylate monomer, characterized as forming a homopolymer having a Tg lower by a range of 2 ºC to 30 ºC than the Tg of said first homopolymer; 10 % to 15 % of a third monomer, characterized as forming a homopolymer having a Tg lower than 35 ºC; 5 % to 10 % of a fourth monomer, characterized as forming a homopolymer which is capable of absorbing at least 20 % of water by weight; and 2 % to 5 % of a crosslinking monomer. |