title: Cataract formation following vitreoretinal procedures.
abstract: OBJECTIVE
  To evaluate the incidence and prevalence of cataract formation, progression, and extraction in patients that underwent vitreoretinal procedures and to evaluate factors that can potentially predispose patients to postoperative cataracts.
  
  
  METHODS
  The medical records of consecutive patients who underwent vitreoretinal surgery at the Yale Eye Center with at least 6 months of follow-up and no prior intraocular surgery were obtained. Preoperative, intraoperative, and postoperative data were recorded and analyzed in this retrospective observational study. The main outcome measures were defined as cataract extraction, formation, and progression after vitreoretinal procedures. The lens status of the surgical eye was recorded preoperatively and at 1 month, 3 months, 6 months, 12 months, 24 months, and 36 months postoperatively.
  
  
  RESULTS
  A total of 193 eyes of 180 patients fulfilled the inclusion criteria. The percentages of eyes with mild lens change were 96% after 20-gauge pars plana vitrectomy (PPV), 72% after small gauge (23- and 25-gauge) PPV, 38% after scleral buckle (SB), 38% after pneumatic retinopexy (PR), and 91% after PPV plus SB (PPV+SB). Posterior subcapsular and nuclear sclerotic cataracts were the most common with almost all developing within 24 months. There was no statistically significant difference (P=1.00) between the rate of cataract extraction after 20-gauge (41%) and small gauge PPV (42%), but there was a statistically significant difference between PPV and non-PPV (SB, 6%; PR, 7%; P<0.001) and PPV and PPV+SB groups (69%; P=0.0063).
  
  
  CONCLUSIONS
  Cataracts were common following PPV regardless of the gauge. SB and PR led to the lowest while PPV+SB led to the highest risk of postoperative cataracts.
authors.affiliation: Department of Ophthalmology and Visual Science, Yale University School of Medicine, New Haven, CT, USA.
authors.forename: Hao
authors.initials: H
authors.lastname: Feng
authors.affiliation: Department of Ophthalmology and Visual Science, Yale University School of Medicine, New Haven, CT, USA.
authors.forename: Ron A
authors.initials: RA
authors.lastname: Adelman
keywords: cataracts; pneumatic retinopexy; scleral buckle; vitrectomy; vitreoretinal surgery