My cats eye is goopy?

Well pink eye is an infection, and infection does cause pus. If the prescribed drops are all used up, and it's past the time that the vet said it should be cleared up, I would go back again and try to get antibiotics for the cat. My cat was born with an eye infection and it's infection was so bad we literally didn't think he HAD an eye behind all the pus that was there... we had to suck all the pus out with a dropper multiple times a day, and feed it antibiotics, which is a pain in itself... but I'd go back to the vet if the treatment is supposed to be finished.