The method of claim 1 wherein the initiator is a photoinitiator which is activated by exposure to visible light, and the water soluble macromer is selected from the group consisting of poly(alkylene glycol), poly(alkylene oxide), poly(vinyl alcohol), poly(vinylpyrrolidone), poly(ethyloxazoline), poly(amino acid), polysaccharides, proteins, or a block or random copolymer thereof comprising two or m