An efficacy assessment will be made at 12 weeks, and patients who show a 2-step reduction in their intraocular inflammation, and has not met the safety endpoint, will continue with daclizumab therapy. Meeting the safety failure criterion or having a serious adverse affect attributable to the daclizumab therapy will be cause for termination from further daclizumab study treatments. Continuing follow-up and standard-of-care alternative treatments with a potentially reduced visit schedule will be provided through the duration of the trial if daclizumab treatments are suspended. After the trial, participants may seek other standard-of-care treatments from their own physician or ophthalmologist or they may be eligible to enroll in other research trials if these are available.