Uveitis is characterized by inflammation in the uvea, the part of the eye between the sclera and retina. Iritis, a form of uveitis close to the front of the eye, is common in ankylosing spondylitis. Any form of uveitis can cause permanent damage, including vision loss, if not treated quickly. Symptoms may include light sensitivity, burning pain, blurred vision and redness of the sclera. Treatments include eye drops, including steroids. Severe cases may require oral or injected steroids.