Clinical Evaluation of the Adaptilens Accommodating IOL

Inclusion Criteria: * Adults who are at least 21 years of age or older. * Scheduled to undergo primary intraocular lens implantation for the correction of aphakia following phacoemulsification extraction of a senile cataract. * Clear intraocular media other than cataract. * Potential visual acuity of 20/32 or better in both eyes after cataract removal and IOL implantation as determined by diagnostic testing or investigator's judgement. * Preoperative corrected distance visual acuity (CDVA) worse than 20/40 either with or without a glare source present (e.g., Brightness Acuity Tester) or scheduled for cataract removal due to significant cataract-related symptoms/complaints. * Less than or equal to 1.0 diopter (D) of preoperative keratometric astigmatism. * In good general health at screening as determined by the investigator. * Signed written informed consent. * Availability, willingness, and sufficient cognitive awareness to comply with examination procedures and schedule. Exclusion Criteria: * Planned secondary procedures (such as LASIK) during the term of the study; Nd YAG capsulotomy is permitted. * Taking systemic medications that may confound the outcome or increase the risk to the subject. * Ocular conditions that may predispose for future complications. * Previous intraocular or corneal surgery that might confound the outcome of the investigation or increase the risk to the subject. * Pregnant, lactating during the course of the investigation, or with another condition associated with fluctuation of hormones that could lead to refractive changes. * Diagnosed degenerative visual disorders (e.g. macular degeneration or other retinal disorders) that are predicted to cause future CDVA loss worse than 20/40. * Any anterior segment pathology (anterior segment or corneal abnormalities, chronic uveitis, iritis, corneal dystrophy, pseudoexfoliation, etc.). * Glaucoma, glaucoma suspect or ocular hypertension, i.e., IOP \> 22 mmHg. * Previous retinal detachment or retinal pathology, including age-related macular degeneration. * Diabetes, currently being treated systemically and with retinopathy. * Systemic or ocular disease that may prevent the patient from achieving CDVA of 20/32 or better post operatively. * Require chronic administration of any topical ophthalmic or systemic medication that may affect accommodation such as mydriatic, cycloplegic and myotic agents; tricyclic antidepressants, phenothiazines, benzodiazepines, first generation antihistamines, anticholinergic agents. * CDVA of 20/32 or worse in the fellow eye not attributable to cataract. * Current participation in, or have participated in, an investigational study, other than this study, within the previous 60 days before the operative day. * Previous ocular surgery in the operative eye, including refractive surgery.