We retrospectively analyzed by life table analysis the visual and functional results in 500 eyes that underwent combined vitrectomy and silicone oil for various types of complicated retinal detachments. The cumulative proportion of eyes with attached retina was 77% at six months postoperatively, with a range of 71% for perforating injuries to 85% for posterior holes. The proportion of eyes with a visual acuity of 5/200 or better was 69% at six months, with a range of 56% for perforating injuries to 81% for posterior holes. Sixty-nine eyes had poor visual function despite an attached retina, primarily because of cataract (18 eyes) and preexisting retinal or optic disease (31 eyes). Visual function in eyes with clear optical media and an attached retina was stable over time, except in patients with diabetes. No clinical evidence of retinal toxicity to silicone oil was noted.