R. Hornig, IMI Intelligent Medical Implants, Germany
M. Velikay-Parel, Medical University Graz, Austria
This chapter discusses retina implants currently under development that will be used to bypass degenerated photoreceptors of blind people. The chapter first provides some background information and reviews the general approaches of how to build these electronic implants. The approaches differ in the location of the stimulation electrodes. Possible locations are the epiretinal, the subretinal, the suprachoroidal space, the optic nerve and in or on the sclera. The chapter then illustrates the technical implementation of such devices in detail and shows how retina implants are clinically tested.