1. A method for determining a point of gaze directed at a graphical display, the method comprising: a) acquiring an image of at least one eye of a user containing, for each eye, at least three image aspects, with at least one gaze aspect and at least one reference aspect, and performing for each eye in the image: b) extracting the image aspects from the image, the image aspects comprising a set of reference aspects and a set of gaze aspects corresponding to the image; c) extracting a set of features for each of said image aspects; d) computing a set of feature vectors between said set of gaze aspects and said set of reference aspects, wherein each said feature vector describes a relationship between one or more features of a gaze aspect and one or more features of a reference aspect; e) computing a point of gaze for each of said set of feature vectors, using a predefined mathematical relationship or model; and f) using another predefined mathematical relationship or model to combine the computed points of gaze into a final point of gaze on the graphical display.