1. A system for treating a particular patient with a prescription that mitigates or treats a vision condition of an eye of the patient, the system comprising: a first module that accepts a first wavefront map of the eye that corresponds to a first geometrical configuration of the eye in an evaluation context, the first wavefront map characterized by an original set of coefficients for a basis function that can be separated into a product of a first set of radial polynomials and a first triangular function; a second module that determines a second wavefront map of the eye that corresponds to a second geometrical configuration of the eye in a treatment context, the second wavefront map characterized by a transformed set of coefficients for the basis function that is based on the first geometrical configuration of the eye, the original set of coefficients, and the second geometrical configuration of the eye, such that each coefficient of the transformed set of coefficients is based on a corresponding coefficient of the original set of coefficients and a corresponding polynomial; a third module that establishes the prescription for the particular patient based on the transformed set of coefficients; and a laser ablation system that modifies an optical tissue surface of the eye of the patient according to the prescription.