Frequently Asked Questions Where Is The Argus® II Retinal Prosthesis System Available In the US? For a list of cities where Argus II implanting centers are located, please click "Availability in North America" tab. Which Of My Patients Might Benefit From Argus II? Argus II is currently approved and intended for use in patients with severe to profound retinitis pigmentosa (RP) who meet the following criteria: Adults, age 25 years or older 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.) 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. The Argus II is intended to be implanted in a single eye, typically the worse-seeing eye. For more information on contraindications and other labeling, contact Second Sight physicians. How Do I Learn More? For more information about the system: Argus IIFor other general questions contact our physicians HUMANITARIAN DEVICE: Authorized by Federal (U.S.) law to provide electrical stimulation of the retina to induce visual perception in blind patients with severe to profound retinitis pigmentosa and bare light or no light perception in both eyes. The effectiveness of this device for this use has not been demonstrated.