How long does a person who has glaucoma live?

Answer 1

Untreated glaucoma can cause blindness, but it's not itself directly fatal. Someone with glaucoma will live, on average, about as long as they would have if they'd gone blind from some other cause.

Answer 2

Glaucoma is not itself fatal. If untreated it can cause blindness, which is not itself fatal either... but if you can't see you might walk in front of a moving train, which could be fatal.