ABSTRACT

T he eye is our preeminent sense for acquiring information from the externalenvironment, and nearly all such acquisition is accomplished when the eyefixates an object. The eye has evolved so that its movement to the next fixation point is the fastest of all external information acquisition behaviors. Its unique value has led humans to rely on it for nearly all intellective tasks. Without vision, can one imagine the development of writing, and without writing, the development of civilization?1