Uveitis is inflammation of the central pigmented layer of the eye known as the uvea or uveal tract. Uveitis has different effects on different people depending on which part of the uvea has been affected.

Uveitis can affect people of any age, however, most common between the ages of 20 and 59. It is believed to affect around two to five out of every 10,000 people.

Although it is not a common eye condition it is a leading cause of visual impairment in the UK. Estimates suggest that the more extreme cases of uveitis are responsible for one in every 10 cases of visual impairment in the UK.

One or both eyes can be affected by uveitis with symptoms either developing suddenly or over the course of a few days.