Well, generally speaking, it is possible to have iritis for many people. And there are many causes such as trauma, inflammatory eye disease, or an eye infection can lead to iritis. And in common, it will just take one week to recover, if you have taken some measures. For the treatments, the anti-inflammatory cortisone eye drops are often used. By using them, it can relieve some of the pain; also, the drops can keep the pupil dilated to avoid it becoming scarred down. By the way, they are adherent to the focusing lens of the eye. Anyway, it can be helpful, you can have a try.