For three months I have had conjunctivitis, since I had a flu. It starts in one eye and goes to another and after a week and a half of prescription therapy it goes away, only to come back- starting the cycle al over again. There is very little discharge and no pain. I was first on vigamax for the first few weeks (no relief from that prescription) then have been using zylet for a total of a month and a half. This last period being on a course of 4 drops a day for a week, then three for a week then 1 drop for a week. As I started the three drop therapy, my eye infection returned worse then ever. This is about the fourth reoccurrence since Jan 6. (it is now the end of March). Do you have any advice? I am a bit concerned about the long term use of zylet.