Uveitis

**Semantic type:** Disease or Syndrome

**Definition:** An inflammatory process affecting a part of or the entire uvea. Causes include inflammatory agents (e.g., herpes simplex, herpes zoster, leptospirosis) and systemic diseases (e.g., inflammatory bowel disease, multiple sclerosis, systemic lupus erythematosus, ankylosing spondylitis). Patients present with pain and redness in the eye, light sensitivity, and blurred and decreased vision.