[The implantation of intraocular lenses (author's transl)].

To become an implant surgeon means that one is ready to accept some opposition from part of the profession as well as to known all the shortcomings of conventional cataract extraction. A good knowledge of the history of implantation is necessary to avoid past errors in the shape, manufacture sterilization and in the locus of insertion of the intra-ocular lens. At the start few indications will be retained mainly unilateral cataracts traumatic or not, the aim being restoration of a full binocular vision. The interest of the test of Pulfrich is stressed for the follow up of cataract. A large number of contra-indications will be respected mainly corneal dystrophics or degeneration, uveitis, myopia, detachment and diabetes. The would-be implant surgeon has to train in modern extracapsular cataract extraction, learn the refinements of implantation technique with a full and constant respect of the corneal endothelium. He also should be able to cope with eventual complications and to suture the implant to the iris. He has at first to limit his choice to a small number of implant models which have proved safe: the iris clip and iridocapsular models of C. D. Binkhorst and the slotted-medallion of J. G. F. Worst. Experience will allow in time widening of indications and new improvements of technique.