1. An apparatus for eye tracking, comprising: (a) an illuminator; (b) reflection means to reflect illumination from said illuminator onto a surface of a windshield of a vehicle in which said windshield is installed, such that said illumination is reflected onto at least an eye of a person in said vehicle, and to reflect an image of said at least an eye; and (c) a sensor to receive a reflection of said image of said at least an eye reflected by said reflection means and to produce an output signal representative thereof.