Selection of Aspheric Diffractive Multifocal Intraocular Lens (IOLS) Based on Corneal Wavefront

Inclusion Criteria: * 18 years of age or older * Scheduled to undergo bilateral cataract or refractive lens surgery * Visual potential of 20/30 or better in each eye after lens removal and IOL implantation * Naturally dilated pupil size (in dim light) \> 3.5 mm (with no dilation medications) for both eyes * Preoperative regular corneal astigmatism of 2.5 D or less * Clear intraocular media other than cataract * Availability, willingness, and sufficient cognitive awareness to comply with examination procedures Exclusion Criteria: * Ocular disease other than cataract which could potentially limit uncorrected visual acuity or visual performance. * Astigmatism not correctable by limbal relaxing incisions (greater than 2.5 D) * Use of systemic or ocular medications that may affect visual outcomes * Acute or chronic disease or illness that would increase risk or confound study results (e.g. diabetes mellitus, immunocompromised, etc.) * Uncontrolled systemic or ocular disease * History of ocular trauma or prior ocular surgery * Amblyopia or strabismus * Known pathology that may affect visual acuity; particularly retinal changes that affect vision (macular degeneration, cystoid macular edema, proliferative diabetic retinopathy, etc.) * Diagnosed degenerative visual disorders (e.g. macular degeneration, or other retinal disorders) that are predicted to cause future acuity losses to a level of worse than 20/30 * Subjects who may be expected to require retinal laser treatment or other surgical intervention * Capsule or zonular abnormalities that may affect postoperative centration or tilt of the lens (e.g. pseudoexfoliation syndrome) * Pupil abnormalities (non-reactive, tonic pupils or abnormally shaped pupils) * Contact lens usage within 6 months for PMMA lenses, 1 month for gas permeable lenses or 1 week for extended-wear and daily-wear soft lenses * Requiring an intraocular lens power \<15.0 or \>26.0 diopters