1. A computer-implemented method for segmenting components of an eye image for creating data to be used in a system for processing eye image data, the method executed by one or more computing systems and comprising: creating, by the one or more computing systems, an eye histogram of pixel intensities from a distribution of grey levels of an eye image, the eye histogram having two or more classes, each class corresponding to a component of the eye image; selecting, by the one or more computing systems, thresholds in the eye histogram to divide the classes of the histogram; creating, by the one or more computing systems, threshold images, each of the threshold images corresponding to one of the two or more classes; and removing, by the one or more computing systems, a portion of the eye image based on one or more of the threshold images.