A number of research groups are developing electrical implants that can be attached directly to the retina in an attempt to restore vision to patients suffering from retinal degeneration. However, despite promising results in animal experiments, there are still several major obstacles to overcome before retinal prostheses can be used clinically.
No takes yet. Share an insight, caveat, or question.
Eberhart Zrenner (2002) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: