Can I just say YOU ROCK!Steve is one lucky bird to have landed at your place.
I would definitely suggest making the ramp wider. I would also suggest repeatedly shaking a can of food up there & calling him up the ramp. It would take a few days of effort on your part, but chickens learn pretty quick. As with any blind animal, once he learns be sure not to change anything.
A quick comment about the bell... I read that she waits for him, which means he's not following her. Wouldn't putting a bell around her neck be pointless?
@room onthebroom I agree, OP does rock! And Steve is lucky indeed to have landed there.
As for my suggestion about the bell... at this point, Steve cannot follow Juliet because he has no way of knowing where she is. With a bell on her, I think there is a chance he may learn to follow her. And then, with time, she may learn to lead him. As I said, it is worth a try. I am sure we have all heard of goats leading horses, etc. There is sure to be a learning curve, but it has to start somewhere. It was just a suggestion.