Comparison of the Quality of Vision Provided by AMO Tecnis Z9000 and Alcon Laboratories MA60 Acrysof Posterior Chamber Intraocular Lenses

Inclusion Criteria: Bilateral cataracts, eligible for phacoemulsification with primary implantation of a posterior chamber IOL Males and females 50 to 80 years of age Expected maximum of 6-weeks and minimum of 3 weeks interval between a single patient's surgeries Best corrected visual acuity (BCVA) should be no better than 20/40 in the presence of a glare source. (In the early treatment diabetic retinopathy study [ETDRS] visual acuity chart, better than 20/40 will be at least 3 letters read correctly in the 20/30 line). Best corrected visual acuity projected by Potential Acuity Meter (PAM) or other reliable potential acuity test procedure to be 20/30 or better in each eye after cataract removal and IOL implantation. Naturally dilated pupil size (in dim light) ≥ 4.0 mm (with no dilation medications) - both eyes Anticipated correction with an IOL of +6 to +30 diopters (both eyes) Evidence of a personally signed and dated informed consent document indicating the patient (or a legally acceptable representative) has been informed of all pertinent aspects of the trial Willing and able to comply with scheduled visits and other study procedures Exclusion Criteria: Preoperative pathology: amblyopia, rubella cataract, proliferative diabetic retinopathy, shallow anterior chamber, macular edema, retinal detachment, aniridia or iris atrophy, uveitis, history of iritis, iris neovascularization, medically uncontrolled glaucoma, microphthalmus or macrophthalmus, optic nerve atrophy Previous intraocular or corneal surgery, including refractive surgery, corneal transplant Other pathologies potentially affecting visual acuity, e.g., macular degeneration, glaucoma with the presence of visual field defects An increased risk for complications which could require vitreoretinal surgery Corneal irregularities potentially affecting visual acuity, e.g., keratoconus, corneal dystrophy Corneal opacities Keratometric astigmatism exceeding 1.5 diopters Patient in whom postoperative refractive error is planned to be different between fellow eyes (anisometropia) such as in cases where postoperative refraction is planned for mono-vision Current contact lens usage (within 6 months prior to first surgery and/or during the study) Other ocular surgery at time of cataract extraction Uncontrolled diabetes Any neurological condition that might interfere with performance of required tests Immune deficiency disease Other severe acute or chronic medical or psychiatric condition or laboratory abnormality that may increase the risk associated with study participation or study device implantation or may interfere with the interpretation of study results and, in the judgment of the investigator, would make the patient inappropriate for entry into this study Use of any systemic or topical drug known to interfere with visual performance