Possibly - mine sometimes do a "roll call" at night. I wouldn't turn her out with the others full time until she can hold her own. When mine come in the house, which is quite often lately, they stay in a large dog crate that my husband has made carpeted roosts for. If you have a dog crate, it...
Be careful of the grass. You will need to offer her gravel if she is eating anything other than chicken feed, and long grass can lead to crop impaction. You might want to check with @Wyorp Rock as to how long to continue the meds. Be sure to purchase poultry probiotics to administer after...
Maybe just keep some moist food and water in front of her. Dip her beak in the water, perhaps, like we do when they first hatch? I have read blind chickens can survive with help.