I just set my camera to B&W, shot one pic, moved just a touch to the side and shot again. Went into Photoshop, turned one red, one blue, merged them, made one layer transparent, using the arrow keys I slid one just a bit to one side and used the color burn feature to strengthen the saturation. The glasses I have had no arms so I ended up wearing them backwards. When moving one to the side I didn\'t realize this and thus it\'s color/backwards.
Fun trick though.