Patients receive intravitreal injections of ISIS 2922 at doses of either 150 or 300 mcg, depending on CMV retinitis location and extent of retinal involvement. There is a 3-week Induction period followed by at least 18 weeks of Maintenance. Induction is given on days 1, 8, and 15, and Maintenance doses are given every 14 days, beginning on day 29.