The invention relates to an ophthalmic molding such as a contact lens or any kind of ocular prostheses comprising an organic bulk material having covalently bonded to its surface an acceptor saccharide to which is enzymatically attached one or more further carbohydrates. The ophthalmic moldings of the invention have desirable characteristics regarding, for example, adherence to the substrate, durability, hydrophilicity, wettability or biocompatibility.