Presumed Transcorneal Extrusion of A Posterior Chamber Intraocular Lens

Purpose: To describe a case with a rare complication of posterior chamber intraocular lens (PC-IOL) implantation in a patient who had undergone extracapsular cataract extraction (ECCE) two years before Case report: A 80-year-old diabetic woman presented with an exposed PC-IOL in her left eye with a history of mechanical trauma. Slit-lamp examination revealed an extruded PC-IOL lied on the anterior surface of cornea. The IOL optic part was firmly attached to the anterior surface of cornea while the haptics pierced the corneal tissue to the ciliary sulcus, detectable by ultrasound biomicroscopy. Conclusion: Posterior chamber intraocular lens dislocation can have grave consequences, including corneal touch, corneal decompensation and melting leading to severe visual loss. The possible mechanism of extrusion was presumed to be a cheese wiring process after corneal melting, leading to an exposed IOL.