I agree with Jodi that you should have him evaluated by an ophtalmologist, because it would be a shame for him to live his life blind if there was something that could be done to help him. You never know.
It's wonderful that he has you to love him. I found these sites that may assist you:
Google Tips for Blind Puppies Lantern Publications - Living with Blind Dogs Training a Deaf Dog, Training a Blind Dog - Overcoming the Problems