Photocoagulation...red, white, blue, and green.
D001128:Argon; D003452:Cryosurgery; D005128:Eye Diseases / Q000601:surgery*; D006801:Humans; D053685:Laser Therapy; D007834:Lasers; D008028:Light Coagulation; D014978:Xenon
D014978:Xenon; D001128:Argon