Patients 6 years of age and older with non-infectious uveitis of at least 3 months' duration who require treatment with immune suppressing medicines, such as prednisone, cyclophosphamide, cyclosporine, azathioprine, methotrexate, or others, may be eligible for this study. Candidates will be screened with a medical history and physical examination, blood tests, complete eye examination, and a questionnaire about the patient's vision and daily activities.