1. A system for identifying a user by observing irregularities on the surface of an eyeball of the user, comprising: means for measuring and storing one or more discernable features of the eyeball; and means for observing the irregularities and comparing the irregularities to the one or more discernable features, wherein the means for observing the irregularities and comparing the irregularities to the one or more discernable features identifies the user if the irregularities and the one or more discernable features match.