O boy. About 13 years ago my horse had an eye problem. Called the vet and he prescribe ointment for a very common bacterial issue. (our first year here). Anyway I didn't realize that I should have gotten results within 24 hours. A couple days later I called the vet saying that there was no change. He sent me down to the city for further tests. Turns out it was a fungus. Huge surgery, lots of recovery time and tons of money. Now he has a blind spot, but they did manage to save his eye.
I guess my point is, if an eye issue goes on for more than a couple of hours you need a vet. The eye can heal common problems incredibly fast, but the more difficult things can cause a very bad problem.