Smart devices, namely, smart glasses; Wearable Devices, namely, smart glasses; Smart Sensors, namely, eye, head and other parts of human body motion tracking sensors for positions, orientations, speed of eye, head and other parts of human body motions; Pointing devices, namely, body motion controlled pointers; Pointing devices that users can use their gaze point to interface with other machines; Motion tracking devices that detect motions of eye, head and other parts of human body; Interactiv...