Well, it seems that there is something wrong with your eyes. Anyway, iritis is one of the most serious and complicated eye problems we might get. So, we must place much emphasis on it. Anyway, if you want to thoroughly take out the problem, it requires a lot of efforts and attention to your eyes, including a healthier diet, exercise, proper use of eyes, as well as proper medicine. Generally speaking, the symptoms could last several weeks but maybe if things are going well, half a year could be enough. Try to protect your eyes from every angle.