After the introduction of phacoemulsification and ECCE at the Charlottenburg eye clinic of the Free University of Berlin, Simcoe posterior chamber lenses have been implanted there routinely since May 1982. Up to August 1983, 1124 posterior chamber lenses had been implanted, all of the Simcoe type. The advantages of posterior chamber lens implantation having been dealt with elsewhere, the authors point out the complications of the procedure in this paper. The complications seen were cyclitic reactions, including hypopyon in 6 patients. In one patient a rhegmatogenic retinal detachment was diagnosed 2.5 months after phacoemulsification and implantation of a Simcoe lens. Decentered lenses were found in 3 patients, in one of them after phacoemulsification of a radiogenic cataract with capsulotomy. In 2 patients the posterior capsule ruptured during insertion of the lens but the lens remained lodged in the sulcus, so that it did not have to be removed. Since March 1983 all Simcoe posterior chamber lenses have been fitted (in a total of 571 eyes) with loops angled 10 degrees forward, as suggested by the authors. Iris capture syndrome was found in 12 patients (2.2%) of a group in which 553 lenses without angled loops had been fitted. The condition was not found in any of the patients to whom lenses with angled loops had been fitted.