I will always repost this article: Their Bionic Eyes Are Now Obsolete and Unsupported - Second Sight left users of its retinal implants in the dark
https://spectrum.ieee.org/bionic-eye-obsolete
“I remember exactly where I was: I was switching from the 6 train to the F train,” Campbell tells IEEE Spectrum. “I was about to go down the stairs, and all of a sudden I heard a little ‘beep, beep, beep’ sound.”
It wasn’t her phone battery running out. It was her Argus II retinal implant system powering down. The patches of light and dark that she’d been able to see with the implant’s help vanished.