What is your algorithm for transitioning a patient with chronic noninfectious posterior uveitis from corticosteroids to immunosuppressive therapy?

There are some forms of noninfectious posterior/panuveitis where it is known from the time of uveitis diagnosis that steroid-sparing immunosuppression (IMT) will be needed. For example, in birdshot retinochoroiditis or serpiginous choroidopathy, IMT is often initiated in concert with oral corticosteroids once infectious labs have returned negative. In cases where it is unclear whether steroid-sparing IMT is needed but oral steroids are necessary to achieve inflammatory control, starting oral ste...