According to aÂ Health & Medicine Week article on devicelink.com,Â the Argus II device contains electrodes that are attached to the retina and used in combination with an external camera and video processing system. The implant should be able to provide a basic form of sight for patients. Second Sight is the only manufacturer ofÂ an actively-powered permanent retinal prosthesis implant that is under clinical study in the United States, according to the article. Retinitis pigmentosa causesÂ a gradual loss of peripheral vision that can eventually lead to blindness. This implant could be a significant development for patients with few treatment options.