It depends on which part of your eye is nonfunctional. It turns out there’s multiple redundancies for sensing light, so you could be blind but still be submitting signals to your circadian clock. If your eyes are completely nonfunctional, then yeah you’d have a pretty screwed up clock.
I’ve always wondered if blind people have offset rhythms for sleep.
It depends on which part of your eye is nonfunctional. It turns out there’s multiple redundancies for sensing light, so you could be blind but still be submitting signals to your circadian clock. If your eyes are completely nonfunctional, then yeah you’d have a pretty screwed up clock.