Shar pei eye problem?

For the last 2 weeks my shar pei has had a watery yucky eye that she wont barely open. So i took her to a vet who then gave her antibiotocs anti inflammatory and an eye ointment. So far it hasn t really helped i called the vet and they said to keep watching it. Its been another week since then and its not getting better. It seemed for a cpl days i saw some improvement but alas its not and i think its gotten worse again. Its been 2 visits to the vet and over $300 for meds and exams. We have.had this vet forever and they are always good, but not at this apparently. What could this be for her? I cant figure it out and im worried but i cant keep affording a $100 vet bill every week for crap that doesnt work. If anyone has had similar situations with their pet and or breed or if an experienced vet here.on yahoo answers has any insight it would be greatly appriciated!:)