The authors report on late complications in 100 eyes in which silicone oil injection had been used to treat complicated retinal detachment; the follow-up-period was two years. Redetachment developed in 28 of 100 eyes (30%) during the first year, cataract in 43 of 54 phakic eyes, and glaucoma in 22 of 100 eyes (= 22%). Keratopathy developed in 29 of 46 aphakic eyes up to the 18th postoperative month. After treatment of these complications a visual acuity of 1/50 to 0.4 was observed in 50 percent of the eyes two years after the operation.