Medical measuring and diagnostic equipment, namely, eye, head and other parts of human body motion tracking equipment for positions, orientations, speed of eye, head and other parts of human body motions to determine a user's physical and mental conditions, namely, the shape, size and orientation of the pupil and iris, the direction the eye ball is pointing to, the orientation of the head, the intersection point of the gaze lines of the eyes; Motion tracking devices that detect motions of eye...