1. A miniature eye tracking system, comprising: a camera to image an eye, a microelectromechanical (MEMS) device to control the view-direction of the camera, and a processor that receives an image of the eye from the camera, determines the location of the eye within the camera image, and controls the MEMS device to keep the camera pointed at the eye, wherein the camera includes an open-center asymmetric aperture device that has a single transparent opening and a set of opaque intrusion areas, wherein an outer perimeter of the single transparent opening is inscribed in a circle and the set of opaque intrusion areas intrude into the outer perimeter of the inscribed circle.