title: Comparison of posterior capsular opacification between a combined procedure and a sequential procedure of pars plana vitrectomy and cataract surgery.
abstract: OBJECTIVE
  To compare posterior capsular opacification (PCO) between a combined procedure and a sequential procedure of pars plana vitrectomy (PPV) and cataract surgery (CS).
  
  
  METHODS
  The medical records of 89 eyes of 85 patients who underwent PPV and CS were retrospectively reviewed. There were 56 eyes of 52 patients with a combined PPV and CS (the combined surgery group), and 33 eyes of 33 patients with CS in a previously vitrectomized eye (the sequential surgery group). The control group was comprised of 130 eyes of 102 patients who underwent CS alone. All patients were followed up for at least 1 year after CS. The major outcome measures were the PCO rate and the interval between CS and PCO formation. There were no significant differences in age and the incidence of diabetes among the 3 groups.
  
  
  RESULTS
  The PCO rate checked at 1 year after CS was 12.5% (7/56) in the combined surgery group, 24.2% (8/33) in the sequential surgery group, and 4.6% (6/130) in the control group. The differences in the PCO rate between the subgroups as well as among the 3 groups were statistically significant (p < 0.05). There were no significant differences in the interval between CS and PCO formation among the 3 groups.
  
  
  CONCLUSIONS
  This study demonstrates that the PCO rate may be lower in patients who have a combined procedure of PPV and CS than in those who have a sequential procedure.
authors.affiliation: Department of Ophthalmology, Gachon University Gil Medical Center, Incheon, Korea.
authors.forename: Joon Ho
authors.initials: JH
authors.lastname: Roh
authors.forename: Hee Jin
authors.initials: HJ
authors.lastname: Sohn
authors.forename: Dae Yeong
authors.initials: DY
authors.lastname: Lee
authors.forename: Kyung Hwan
authors.initials: KH
authors.lastname: Shyn
authors.forename: Dong Heun
authors.initials: DH
authors.lastname: Nam
mesh_terms: D000368:Aged; D002386:Cataract; D002387:Cataract Extraction / Q000009:adverse effects* / Q000379:methods* / Q000706:statistics & numerical data; D003930:Diabetic Retinopathy / Q000453:epidemiology; D018572:Disease-Free Survival; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D053208:Kaplan-Meier Estimate; D007903:Lens Capsule, Crystalline / Q000473:pathology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000453:epidemiology / Q000209:etiology* / Q000473:pathology; D012170:Retinal Vein Occlusion / Q000453:epidemiology / Q000209:etiology; D012189:Retrospective Studies; D014821:Vitrectomy / Q000009:adverse effects* / Q000379:methods* / Q000706:statistics & numerical data; D014823:Vitreous Hemorrhage / Q000453:epidemiology / Q000209:etiology