Oh the sweet boy. And bless you for keeping him. I know you've got oodles of love to give him and that's what he needs more than anything right now. My Creamsicle is partially blind, she has no peripheral vision so I doubt that anything I say will be helpful to you. A friend of mine had a blind cat who stretched out her legs/paws in a motion similar to swimming and kinda felt her way around. That's how she eventually handled it. I'm just so glad you took this boy in. I KNOW he's gonna be alright, after a breaking in period and lots of love and patience.

Blessings,
Mary