New Enrollment Post-Approval Study of the Argus® II Retinal Prosthesis System

Inclusion Criteria: * Are adults, age 25 year or older; * Have severe to profound retinitis pigmentosa; * Bare light or no light perception in both eyes; if the patient has no residual light perception, then evidence of intact inner layer retina function must be confirmed; * Have previous history of useful form vision. * Aphakic or pseudophakic. (If the patient is phakic prior to implant, the natural lens will be removed during the implant procedure.) * Patients who are willing and able to receive the recommended post-implant clinical follow-up, device fitting, and visual rehabilitation; * Have consented to the implantation of an Argus II Retinal Prosthesis and subsequently consent to participate in this study; * At the time of the Baseline Visit, do not suffer from non-ophthalmic serious adverse events (e.g. myocardial infarction, etc.) and Exclusion Criteria: * Ocular diseases or conditions that could prevent Argus II System from working (e.g. optic nerve disease, central retinal artery or vein occlusion, history of retinal detachment, trauma, severe strabismus); * Ocular structures or conditions that could prevent the successful implantation of the Argus II Implant or adequate healing from surgery (e.g. extremely thin conjunctiva, axial length \<20.5 mm or \>26 mm, corneal ulcers, etc.); * Ocular diseases or conditions (other than cataracts) that prevent adequate visualization of the inner structures of the eye (e.g. corneal opacity, etc.); * Inability to tolerate general anesthesia or the recommended antibiotic and steroid regimen associated with the implantation surgery; * Metallic or active implantable device(s) (e.g. cochlear implant) in the head; * Pre-disposition to eye rubbing; * Any disease or condition that prevents understanding or communication of informed consent, study demands, and testing protocols, including: * cognitive decline including diagnosed forms of dementia and/or progressive neurologic disease, * psychiatric disease including diagnosed forms of depression; * does not speak a principal language associated with the region, and * deafness; * Pregnant or wish to become pregnant during the course of the study; * Participating in another investigational drug or device study that may conflict with the objectives, follow-up or testing of this study; * Conditions likely to limit life to less than 1 year from the time of inclusion.