Participants come to the NIH Clinical Center for treatment and follow-up visits. The first daclizumab treatment is given as a 90-minute infusion through a vein. A second IV infusion is given 7 days later. If the treatment has successfully reduced the eye inflammation after 2 weeks, then subsequent treatments are given through injections under the skin once a month for up to 1 year. Patients whose eye disease is not improved after 2 weeks stop the study treatments and receive alternative therapy.