Can a flight attendant have only one eye? I have only had one eye for many years and was a flight attendant before it happened now have received a one on one interview with airline. I just wonder if my eye will be a problem.
Let me refer you to the answer of this other question, that says a pilot may be considered for any class of medical (including First Class) with only one functional eye. 

I think its fair to conclude that if a pilot can get a First Class medical with one functional eye, then you can be a flight attendant with one functional eye, assuming that you can fulfill all of the duties required. 

Good luck.