Anterior uveitis, also known as iritis, is inflammation of the middle layer of the eye, which includes the iris (the colored part of the eye) and surrounding tissue. This condition is often connected to autoimmune disorders or inflammatory diseases such as UC, Dr. Shah says, or sometimes trauma. If untreated, it can cause permanent loss of vision. Symptoms include eye pain, redness, blurred vision, and sensitivity to light. Your doctor may prescribe steroid eye drops that dilates the pupils, he says. This helps stop painful spasms in the eye. Most people respond well to treatment, but the condition can reoccur.