I hate to be the first one to reply - but perhaps the best thing is euthansia. You can't spoon feed him for the rest of his life.
An overwhelming majority of blind calves become very dangerous as they get older just because they are very scared all of the time. He will never know where he is and to run a 500 pounder through the sale barn is a very sad sight.
However, if you are intent on keeping him, rub his legs and stand him up. Try giving him a "crutch" such as a halter that you can leave on him and teach him to follow the halter pressure. Use the halter to pull him up. Put the feed far enough away that he has to get up, even if it is just to stand. Force him up and give him the bottle, but stop feeding him while he is down. This will show him that standing is a good thing.
Good luck. I don't say this lightly, but you really should consider if euthansia is more humane.