1. An integrated chip for detecting eye movement, the integrated chip comprising: a sensor component for receiving an image of a user's eye and processing the eye image to identify a center of a pupil of the eye image; wherein the sensor component comprises a CMOS image sensor (CIS) pixel array, wherein the CIS pixel array comprises: a shrink means for reducing a dark interference region around a pupil portion of the eye's image; and an expand means for reducing a light interference region occurring in the pupil portion of the eye's image, wherein the CIS pixel array identifies a center of the pupil of the eye image at a pixel level where the center of the pupil identifies a point the user is viewing.