Arthroscopic surgery is a modern method of performing surgery inside the joint through very small incisions. The incisions are usually about a quarter of an inch in length with two or three incisions per joint as necessary. A tiny video camera is attached to the end of a long, thin microscope, which is placed through the incision. Other long, thin, frequently modernized instruments are used to perform surgery inside the joints. Knees and shoulders most commonly benefit from arthroscopic surgery, but other joints such as the ankle, hip, and wrist may also be done.