Sheila, I am very sorry you are in this heartbreaking situation. I don't understand how the breeder can face herself in the mirror each day knowing how sick this poor little boy was when she sent him home with you.
There was a member here a couple years ago whose Yorkie had the parotid duct transposition surgery and it was a success. She hasn't updated in a long time.
I can imagine this would be a difficult surgery for a puppy. Praying eye drops/meds will help your little guy improve or at least sustain his eyes until surgery is an option.
I feel terrible for you fighting MS and having all of this stress on top of it. Praying for your comfort and your puppy's well-being.