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Doç. Dr., Acıbadem Üniversitesi, Maslak, İstanbul Despite its low incidence rate, dislocated lens material into the vitreus secondary to complicated cataract surgery can cause important complications such as high intraocular pressure, uveitis, corneal edema, cystoid macular edema, retinal detachment (RD), and decreased vision. When managed properly, these expected complications decrease and final vision increases. That`s why the primary intraoperative goals of the anterior segment surgeon are to perform a thorough anterior vitrectomy, remove lens material that is accessible from the anterior approach, and if possible, to place a posterior chamber intraocular lens to the sulcus. Removing dislocated nucleus in the vitreus with pars plana vitrectomy (PPV) at the same session, when the necessary conditions are available, is ideal to decrease postoperative infl ammation and complications. However, if the ideal conditions are not available, it is appropriate to consult the patient to a VR surgeon, starting anti-infl ammatory as well as antiglaucomatous treatment when necessary, and to perform PPV electively in the following postoperative days to first week. This period should not be more than a month. When the retained lens material is only cortex, the eye can be followed-up closely. Small nucleus material can be removed with a vitrector, however using endophacofragmatome in dislocated large and hard nucleus material shortens surgical time. Endophacofragmantation should be performed after total vitrectomy, in the midvitreus, with low energy, and with its tip holding always in contact with the nucleus material. The peripheral retina is inspected with scleral indentation for any retinal tears, and endolaser photocoagulation is performed if needed. As an alternative method, hard nucleus material can be chopped with a new designed intraocular foreign body forceps, and then can be removed with vitrectomy. These eyes should be followed- up for longterm postoperatively for development of retinal tears, and retinal detachment. Thanks to the developments in VR equipments, and increased surgical experience, visual prognosis has become better in recent years. In eyes without a preexisting eye disease, and postoperative complications, final visual acuity can reach to the levels expected from a standard cataract surgery. Keywords : Phacofragmatome, cataract surgery, complication, nucleus drop, pars plana vitrectomy