Could this cat be sick?

A cat we found a couple days ago has a very hoarse meow. She is very friendly and open and doesn't seem to act strangely about anything. I was wondering if this could be some kind of infection or she's just a cat with a quiet, hoarse meow. We haven't taken her to the vet for a checkup yet. She also is blind and one eye, I don't know if that matters or not.