Systems, methods, and devices for determining an optical surface model for an optical tissue system of an eye are provided. Techniques include inputting a Fourier transform of optical data from the optical tissue system, inputting a conjugate Fourier transform of a basis function surface, determining...http://www.google.com/patents/US7748848?utm_source=gb-gplus-sharePatent US7748848 - Calculating Zernike coefficients from Fourier coefficients
