>Are there any similar devices that have been installed in people that have been more successful?
When I was following the retinal implant research several years ago, you'd typically give the patient a few dozen pixels of vision and then the electrodes and the neurons they're stimulating would drift out of sync.
It sounds like there's now a commercial product for people with severely limited vision (Argus) which claims to have stable implants over multiple years in hundreds of patients. Not sure what the quality is like though, and not sure if the technology generalizes to the fully blind (who may have entirely atrophied optic nerves).
It sounds like there's now a commercial product for people with severely limited vision (Argus) which claims to have stable implants over multiple years in hundreds of patients. Not sure what the quality is like though, and not sure if the technology generalizes to the fully blind (who may have entirely atrophied optic nerves).