Arthroscopy is a surgical procedure practiced by orthopedists to investigate, diagnose and treat problems within the joints. During arthroscopy, the orthopedic surgeon makes a small incision in the patient's skin, then inserts some tiny surgical instruments; these devices contain a small lens and a lighting system which are used to enlarge and illuminate the structures inside the joint. The light is transmitted by the optical fibers towards the top of the arthroscope, which is then inserted into the joint. Arthroscopy is a method that can be used in the treatment of various joints and is not very invasive.