Explanation

Juvenile onset arthritisUveitis is inflammation in the coloured part of your eye. You can't usually feel uveitis, but a doctor can see it by looking into your eyes with a special scope. They also take some blood samples, to make sure it's not an autoimmune problem.

You can get uveitis if you have Juvenile Onset Arthritis (JOA), but uveitis on its own does not mean you have JOA. Uveitis is treated by a medicine called atropine that protects your eye until it's better, so it doesn't get damaged. Atropine doesn't hurt, but can mean that you won't be able to see as well as normal for a little while.