It's not likely at this stage. It's pretty advanced and if left alone could spread to the other eye, cause blindness and even death.
Oh ok, I'll wait to see if it can get any better, my 14 day guarantee is not over yet , if he does with in that time, I can get another butterfly or my money back. If not I'll start treatment, I'd rather get a new Butterflyfish for free than spend $60 on antibiotics.