There is a tube at tractor supply sold in a yellow and white box that is for eye infections. It's an antibiotic that I have had to use in the past for one of the dogs. Sorry can't re member name but something like oxytetracycline. Hope gets better. . . Poor baby.
@TBob I haven't seen anything like that in cats so I would suggest to take it to the veterinary clinic. It could be a herpes virus that attacks the cornea and effects the cat's eyesight causing it to go blind from what I read but I am no expert. Poor baby .