1. A system for evaluating an eye of a patient, comprising: a modeling component configured to determine a representation of at least the cornea of the eye from a three-dimensional structural image of the eye and at least one biomechanical property of the eye; a feature extractor configured to extract a plurality of features from the model of at least the cornea of the eye; an ectasia evaluation component configured to calculate at least one parameter associated with the risk of ectasia in the eye from the extracted plurality of features, the calculated at least one parameter including a variable in a therapeutic procedure representing a surgical parameter that can be varied by a clinician in the therapeutic procedure; and a system output configured to provide the calculated at least one parameter to one of a treatment system and a user.