Gaze Tracking with Glass

Google patent that looks at this.  Is gaze tracking here the same as eye tracking?  " .... As proposed by Google, the system would track the eye movements of users of a Google Glass-like product, specifically a “head mounted gaze tracking device.” The system, in essence would track what you happened to look at while you were using Google Glass. ... "    There are many other previous eye tracking patents.  Don't know the specific claims here, but many more unlikely patents have been issued.  Fix the system.