1. A method for analyzing corneal imagery data to diagnosis corneal conditions comprising the steps of: (a) measuring a physical characteristic of a cornea; (b) converting the measured physical corneal characteristic to a digital image comprising a series of digital values; (c) storing in a processor memory the digital values representing the physical characteristics of the cornea; (d) selecting a region of digital values less than or equal to all of the digital values; (e) determining a prediction error for the selected digital values; (f) determining whether the prediction error exceeds a threshold value; (g) selecting a different region of digital values when the prediction error exceeds the threshold; and (h) analyzing the digital representation of the corneal imagery data.