The retina implant is an intelligent visual prosthesis that bridges and replaces the defective functions of the retina and thus can enable blind people to regain modest visual perception. It consists of three parts. The implantable retinal stimulator receives and/or generates electrical signals that are imparted to the ganglia cells and sent on via the optic nerve to the central nervous system.

The visual interface looks like a pair of sunglasses. It captures video images and also conveys the energy required by the implant to the inside of the eye via wireless transmission. The pocket processor contains rechargeable batteries that supply energy for the entire system. It also contains a microcomputer that translates the image data from the visual interface into simulation commands for the retina stimulator.

credit: IMI Intelligent Medical Implants GmbH, Bonn