Patent ID: 8087782

Claim:
A computer system for selecting, from a plurality of IOLs, an IOL for placement into the eye of a subject, comprising: a processor; and a computer readable memory coupled to the processor, the memory having stored therein: an array of ordered values, including: one or more ocular dimensions of the subject; a desired refractive outcome; for each IOL of the plurality of IOLs, a power and an aspheric constant, the power of each IOL being different; parameters of an eye model based on one or more characteristics of at least one eye; and a ray tracing algorithm, wherein the processor is configured to perform one or more calculations to determine a predicted refractive outcome based on the eye model and the ray tracing algorithm; and sequences of instructions which, when executed by the processor, cause the processor to select, from the plurality of IOLs, an IOL for implantation into the eye of the subject, wherein the selection of the IOL is based at least in part on the anterior and/or posterior corneal curvature and the pupil size of the eye of the subject to receive the IOL; wherein the sequences of instructions includes: performing a calculation for the predicted refractive outcome based on the eye model and the ray tracing algorithm from which the longitudinal spherical aberration (LSA) is calculated as the distance between foci of a marginal ray and a paraxial ray; and determining if the LSA is sufficiently low and if not selecting another lens with a different power, a different aspheric constant, and/or a different lens plane.