Causes

In about half of all cases, the specific cause of uveitis isn't clear, and the disorder may be considered an autoimmune disease that only affects the eye or eyes. If a cause can be determined, it may be one of the following:

• An autoimmune or inflammatory disorder that affects other parts of the body, such as sarcoidosis, ankylosing spondylitis, systemic lupus erythematosus or Crohn's disease
• An infection, such as cat-scratch disease, herpes zoster, syphilis, toxoplasmosis or tuberculosis
• Medication side effect
• Eye injury or surgery
• Very rarely, a cancer that affects the eye, such as lymphoma