researchers from imperial college london are improving the da vinci surgical robot [intuitive surgical, inc.] by installing an eye-tracker, which allows surgeons to control the robot's knife simply by looking at the patient's tissues on a screen.
tracking the eyes can generate a 3d map, which in turn can make moving organs -like a beating heart- appear to stand still for easier operation. other features include 'see-through' tissues on the surgeon's screen [so tumors can be seen underneath tissues] and 'no-cut' zones, places where the robot won't allow the surgeon to cut by mistake.
read more about the improvements.the above videos are demonstrations of the da vinci system. the fourth video, bottom-right, is a real operation.