A system for evaluating a point of gaze of a user on an object, the system comprising: an eye tracker, comprising: at least one eye tracker camera associated with a first coordinate system; a light source; at least one computer; at least one positioning camera associated with a second coordinate system, the geometrical data of the object is stored in a storage device accessible to the at least one computer; wherein any combination of the at least one computer is configured to determine: a gaze line of the user relative to the first coordinate system; the position of the at least one eye tracker camera relative to the second coordinate system; the position of the object relative to the second coordinate system; and a gaze point, based on the gaze line in any coordinate system and the at least one object's position in the any coordinate system.