Another RPB research team is developing a retinal prosthetic device called the Intelligent Retina Implant System (IRIS). While similar to other experimental visual prostheses, the IRIS will use 3,200 electrodes to create much higher resolution images. It also will be capable of compensating for changes in retinal structure resulting from retinal degeneration. This will allow the patient to make adjustments that optimize the visual image after implantation surgery.
Other RPB artificial retina projects include: a Thumbtack Photovoltaic Retinal Prosthesis that will incorporate self-powered, light-to-current transducers within the eye, with all interface circuitry outside the eye; and a retinal prosthesis that relies on a biochemical agent for neurotransmission, which may more closely mimic natural visual stimulation than prostheses using electrical stimulation.