A self-contained microsurgical laser which has a housing adapted for mounting on a surgical microscope. Mounted within the housing are an infrared laser source and a visible laser source. Means are provided in the beam path of the infrared laser for interrupting the beam and for polarizing and attenuattng the beam. Beam expanding means are provided in the beam paths. Wave front correction means are provided in the path of the visible laser beam so that its focal point is coincident with the focal point of the infrared laser beam. Means are provided for superimposing the beam of the visible laser onto the beam of the infrared laser. Power level detecting means are provided. Means are provided for deflecting the combined laser beams in the X and Y directions in a plane perpendicular to the combined beam.; Means are provided for focusing the combined beams onto a spot of less than 200 microns in diameter at the focal plane of the focusing means. A method for repairing torn or severed body structure comprising exposing the surfaces to be joined to an infrared laser source for a period of time sufficient to effect the repair.