Bionic eye implant that can restore partial vision for patients with retinal neurodegenerative diseases. As long as the optic nerve remains undamaged, an electrode array is hooked up to the retina’s neurons and receives data from an eyeglass-mounted camera. It’s not a high-res image, but seeing outlines and boundaries makes a big difference.
https://spectrum.ieee.org/the-institute/ieee-member-news/mark-humayun-builds-bionic-eyes