title: Risk factors of iris posterior synechia formation after phacovitrectomy with three-piece acrylic IOL or single-piece acrylic IOL.
abstract: OBJECTIVE
  To identify the risk factors of posterior iris synechia formation after phacovitrectomy with posterior chamber single-piece acrylic intraocular lens (IOL; Acrysof SA60AT) or 3-piece acrylic IOL (Acrysof MA60BM) implantation.
  
  
  METHODS
  We selected 153 eyes of 153 patients treated by phacovitrectomy between March 2000 and August 2006 and retrospectively reviewed the relationship between iris posterior synechiae and various factors, such as IOL type, tamponade, preoperative iris posterior synechiae, major indications for surgery, axial length and preoperative anterior chamber (AC) depth.
  
  
  RESULTS
  IOL type (p = 0.0447), C(3)F(8) gas tamponades (p = 0.0074), preoperative iris posterior synechiae (p = 0.0001) and postoperative AC fibrin deposition (p = 0.0303) were significantly associated with postoperative iris posterior synechiae by multiple logistic regression analysis. The odds ratio (OR) for single-piece IOL versus 3-piece IOL was 2.658 (95% confidence interval, CI: 1.010-6.993), the OR for C(3)F(8) gas versus balanced salt solution was 4.051 (95% CI: 1.455-11.281), for the presence of preoperative iris posterior synechiae 12.868 (95% CI: 3.511-47.165), and the OR for postoperative AC fibrin deposition was 6.012 (95% CI: 1.186-30.468).
  
  
  CONCLUSIONS
  Preoperative iris posterior synechiae, C(3)F(8) gas tamponade, postoperative AC fibrin deposition and the single-piece IOL could increase the rates of iris posterior synechiae after phacovitrectomy.
authors.affiliation: Department of Ophthalmology, Korea University Guro Hospital, Seoul, Korea.
authors.forename: Seong-Woo
authors.initials: SW
authors.lastname: Kim
authors.forename: Jaeryung
authors.initials: J
authors.lastname: Oh
authors.forename: Jong-Suk
authors.initials: JS
authors.lastname: Song
authors.forename: Yong Yeon
authors.initials: YY
authors.lastname: Kim
authors.forename: In-kyung
authors.initials: IK
authors.lastname: Oh
authors.forename: Kuhl
authors.initials: K
authors.lastname: Huh
mesh_terms: D000180:Acrylic Resins; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D007499:Iris Diseases / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology*; D019654:Lens Implantation, Intraocular / Q000009:adverse effects*; D007910:Lenses, Intraocular / Q000009:adverse effects*; D008297:Male; D033401:Microscopy, Acoustic; D008875:Middle Aged; D016017:Odds Ratio; D018918:Phacoemulsification / Q000009:adverse effects*; D011183:Postoperative Complications; D012189:Retrospective Studies; D012307:Risk Factors; D014821:Vitrectomy / Q000009:adverse effects*
chemical_list: D000180:Acrylic Resins