1. A method for eye gaze tracking, comprising: providing an imaging device for acquiring images of at least one of a subject's eyes; providing one or more markers associated with a surface, object, or visual scene for producing corresponding glints or reflections in the subject's eyes; analyzing the images to find said glints and the center of the pupil; and (i) identifying at least one marker corresponding to at least one glint that is within a threshold distance of the pupil center; or (ii) identifying at least two markers corresponding to at least two glints, and calculating a coordinate within the surface, object, or visual scene by interpolating between the location of the at least two markers on the surface, object, or visual scene according to the relative distance to the center of the pupil of each corresponding glint; wherein the identified marker or interpolated coordinate is indicative of the subject's point of gaze at the surface, object, or visual scene.