1. A gaze vector determination system for use in a mixed reality display system comprising: at least one image generation unit for generating at least one virtual image for display by a near-eye, mixed reality display device; a respective arrangement of gaze detection elements positioned on the display device for forming a spatial relationship between the gaze detection elements and at least one eye, the gaze detection elements including a set of illuminators for generating glints on the at least one eye each illuminator positioned on the display device at a respective predetermined position and generating illumination about a predetermined wavelength, and at least one sensor for capturing light reflected from the at least one eye and generating data representing the captured reflected light, the at least one sensor positioned at a predetermined position in relation to predetermined positions of the set of illuminators on the display device; a memory for storing software and the data; and one or more processors communicatively coupled to the at least one sensor to receive the data representing the captured reflected light and having access to the memory for storing the data, the one or more processors determining a gaze vector for the at least one eye based on the data representing the captured reflected light, wherein data representing the captured reflected light includes glint intensity data and wherein for the at least one eye, the one or more processors determining the gaze vector comprises: in a time period, using a first technique that comprises determining at least one of a center of a cornea and a center of a pupil based on image data of the at least one eye a first number of times, and during the same time period, using a second different technique based on the glint intensity data independent of the image data of the at least one eye for a second number of times.