1. A portable, high speed, head mounted pupil dilation tracking system comprising: a head mounted base adapted to be attached to a patient's head; at least one digital camera attached to the base, operating at least at 30 frames per second and configured to take images of one of the patient's eyes; and a controller coupled to each digital camera and receiving and storing data signals there from, the controller configured to calculate eye related data including pupil dilation from the digital camera images, and configured to display the eye related data to users.