The material according to the invention is an acrylic copolymer, which is crosslinked, viscoelastic, flexible and deformable at room temperature and hydrophobic, of at least 50 wt % of acrylic or methacrylic monomers and cinnamic alcohol. The mixture of monomers preferably includes: —at least one arylalkoxy-acrylate or one arylalkoxy-methacrylate; at least one hydroxylated acrylate and one hydroxylated methacrylate; at least one ethoxylated diol diacrylate and one ethoxylated diol dimethacrylate; and cinnamic alcohol. Said material is obtained in a single step of radical polymerization and is presented in the form of a three-dimensional macromolecular network including a cinnamic alcohol unit. Said material is used for manufacturing intraocular lenses (1).