1. A computer-implemented method of acquiring pupils, said method comprising the steps of: receiving a full frame image captured by an image capture component; decimating said full frame image to produce a decimated image; applying a pupil filter to said decimated image to identify pupil pixels; acquiring a pupil candidate from said filtered decimated image; identifying a corresponding region of interest of said pupil candidate in said full frame image; binarizing said region of interest to identify pixels representative of pupil edge; and applying a best-fit circle to said pixels representative of pupil edge.