title: Use of pars plana vitrectomy with phacoemulsification in vitreous cavity to treat complete posterior dislocation of lens.
abstract: BACKGROUND
  The purpose of this study was to evaluate pars plana vitrectomy (PPV) with phacoemulsification in the vitreous cavity for treatment of complete posterior dislocation of the lens without any damage to the lens capsule.
  
  
  METHODS
  We evaluated factors such as cause of dislocation, scleral fixation of an intraocular lens (IOL), preoperative and postoperative visual acuity, corneal endothelial cell density, and intraoperative and postoperative complications.
  
  
  RESULTS
  Displacement in the eleven eyes studied was mostly caused by ocular trauma and was idiopathic (four eyes each). Scleral fixation of the IOL was performed in seven of the eyes during first-time PPV. Visual acuity was improved in two eyes, unchanged in eight eyes, and worse in one eye. Mean corneal endothelial cell density was 2485 cells/mm(2) preoperatively and 2301 cells/mm(2) postoperatively. No significant differences were seen before and after the surgeries (P = 0.15, paired t-test). Intraoperative complications included retinal detachment and suprachoroidal hemorrhage in one eye each. The most common postoperative complication was transient ocular hypertension, which occurred in three eyes. IOL dislocation and vitreous incarceration of the anterior chamber in one eye required a second operation, while retinal detachment in one eye required a third operation.
  
  
  CONCLUSIONS
  When treating a completely dislocated lens, prevention of retinal detachment which subsequently can affect the visual prognosis is the most important factor to be addressed after PPV with intravitreal phacoemulsification.
authors.affiliation: Department of Ophthalmology, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Saitama, Japan. onihei@bu.edu
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Mutoh
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Matsumoto
authors.forename: Makoto
authors.initials: M
authors.lastname: Chikuda