. "An advantageous polymeric material formed from the Material A macromer of the present invention is a copolymer of the aforementioned Material A macromer; an acrylated or methacrylated siloxane monomer, preferably methacryloxypropyltris (trimethylsiloxy) silane (referred to herein as ???Tris???); a hydrophilic monomer, preferably 2-hydroxyethyl methacrylate (HEMA); and preferably, a cross-linking a" . . .