What might happen to a person’s sense of depth or distance if they only have one functioning eye?

The person wouldn’t be able to tell how close or far something would be

i really wish i could answer this question for you

fumikage isn't really a bird, and tsuyu does have teeth. tsuyu has a transformation quirk which still allows her to be partially human. otherwise we'd have a large frog running around. fumikage has teeth because again, he isn't a bird. his head was a quirk mixture if i'm correct.