I can see why Mooch is a very special dog. Overcoming those horrible beginnings and still trusting people is no small feat.

You are also a very special person. Not many would have done what you did.

You are absolutely doing right by her. Many many dogs live complete lives blind. You just need to be careful not to change things suddenly, just as if you were living with a blind person.
Another thing I've heard of people doing is helping their dogs use their sense of smell to get around. You put a few drops of a scent near certain areas ie. Put a lavender scent at the top of stairs, or a few drops of peppermint in a doorway etc. (I'm not sure if I explained that properly).

Anyways, she looks like a great dog and sounds like she already has a good handle on her being blind. Dogs are such adaptable creatures. We can learn so much from them, especially one as special as Mooch.