I've got a Buff OrpingtonXSpeckled Sussex about 10 weeks old that's blind, (has eyes but they are sort of sunken in) and I'm not sure she hears very well either. All the other chickens free range - I mean free, we've got 75 acres with no fencing if they are so inclined - but Helen can't join them. She lives in an 8X4 pen with a ramp up to a 2X4 coop, and unless I pick her up and put her in the lower part on the grass she'd stay in the coop all day. The older chickens will kill her if they get at her since she can't see to get away and doesn't know what's happening so when they start pecking at her she just runs and screams, randomly bashing into things. Her age-mates tolerate her just fine but certainly don't look out for her. She doesn't seem to care that she is alone during the day - I'm not sure if she has neurological damage as well as the blindness or not. When stressed she moves to the left in tiny circles. At some point the other little ones will be integrated into the flock and sleep in the big coop at night, leaving Helen by herself all the time.
She learned to eat and drink slowly, after about a week. We'd put her on a table with a water container right in front of her and push her head down into it. She'd drink, but wouldn't seek it out on her own. We continued to show her and after several days of 7 or 8 sessions of showing, she learned what the waterer was for and began to drink on her own. Same thing with food, repeat 10,000 times and she may get it. She has learned to identify things with her feet, like her food container. Use the exact same container all the time. My DH says anything else is like moving the furniture around in a blind person's house, not fair! And yes, keep them in the same place all the time. Helen has learned to try new treats, but they must be cut up fine and placed in her little plastic treat container. When you push that against her chest, she'll dip her beak in to see if it's good, at least most of the time.
She is, and will always be, a high maintenance chicken. I am still considering culling her when I dispense with the extra roosters.
Good luck with your decision!