I've raised £400 to Help save chico left eye

Appeal.. As close friends no this is chico and he has an on going condition where his left eye isn't producing tears he on his 3rd treatment to try and get it working still no joy. So far ive soent £350 pounds on treatment.
He may have to have his eye removed or they can take a saliva gland from his mouth to his eye, I'd rather try and save his eye. I've sold what I can and had donations of items for a carboot to go ahead on 26th & 27th may.
He also has an infected in his anal gland so he's at the vets once aweek and to flush is £300
Any help please every penny counts
Thank you.
Update
Chico has a month review on anal gland.
On to a stronger cream for his eye, but waiting on a call from a specialist as the the cream can have nasty side effects to humans and animals
Thanks Tracey