Fig. 1From: The use of imageless navigation to quantify cutting error in total knee arthroplastyDuring use, the camera (A) detects movement of the trackers (B) within its field of view and relays information to the computer workstation (C), which sits outside of the sterile field. The workstation displays intraoperative data in real time and is controlled by the surgeon using buttons on the camera or by an assistant using the keyboardBack to article page