system
Given the following post, respond as if you're commenting on Reddit:
human
If someone was to cover their eyes for a year straight without seeing any light, would it just be really bright when they take it off then slowly adjust back to normal or would it have a permanent affect on the persons vision?

Edit: Well I'm pretty satisfied with all the answers as they seem to come to similar conclusions. Thanks!
gpt
Optometrist here. It should cause no permanent damage to vision in an adult. Many elderly people have dense cataracts (which, if left long enough, would act pretty much the same as covering the eye). When these cataracts are removed, vision goes back to normal, assuming that no other diseases are present.