You may be wondering how the laser comes to reach organs inside the body. The answer to this is another fantastic laser related technology known as fiber optics .
Laser light passes through extremely thin hollow tubes without losing intensity or changing color.
Optical fibers can be inserted into natural or surgically created holes in the body. Light can be received through one fiber and transmitted through another. This way a doctor can both see the problem and effect it. For instance, a small hole in the stomach can be made with a laser incision. An optical fiber is inserted to reach the gallbladder.