TeachEngineering has a lesson plan, Biomedical Devices for the Eyes, that provides background information on eye problems and vision deficiencies. The lesson plan introduces students to a variety of biomedical devices, including retinal implants.
The Scientist provides a series of short articles that offer a general overview of retinal implant devices.
The article, “Bionic Senses” from Harvard University, provides background information about how neuroprosthetics can help restore sight and hearing through the use of cochlear and retinal implants.