This study will examine the safety and effectiveness of a monoclonal antibody called daclizumab in treating uveitis, an eye inflammation. Monoclonal antibodies are genetically engineered proteins made in large quantities and directed against a specific target in the body. Daclizumab is designed to prevent a specific chemical interaction needed for immune cells called lymphocytes to produce inflammation. In an ongoing NIH study of 10 adults with uveitis, 8 patients were able to decrease corticosteroids and other immunosuppressive medicines they were taking while receiving daclizumab for months or even years. The study will be conducted at three different sites, including the NIH Clinical Center.