Patients 18 years of age and older with non-infectious uveitis in one or both eyes who are being treated with daclizumab and have not had a relapse or disease flare for 6 months before entering this trial may be eligible for this study. Candidates are screened with a medical history and physical examination, blood tests, complete eye examination, and pregnancy test for women who can have children. Women of child-bearing potential who enroll in this study will have a pregnancy test every 12 weeks.