The invention generally pertains to a combination of a haptic device with a computer-assisted surgery system. The haptic device may be used as an input device, allowing information to pass from the user to the computer-assisted surgery system, and providing functionality similar to common user interface...http://www.google.com.tw/patents/US8095200?utm_source=gb-gplus-share專利 US8095200 - System and method for using a haptic device as an input device