title: CHOROIDAL THICKNESS CHANGES AFTER VITRECTOMY WITH SILICONE OIL TAMPONADE FOR PROLIFERATIVE VITREORETINOPATHY RETINAL DETACHMENT.
abstract: OBJECTIVE
  To access the potential effect of vitrectomy and silicone oil tamponade on the choroid.
  
  
  METHODS
  Eighteen patients (18 eyes) who had undergone pars plana vitrectomy with 1,000-cSt silicone oil tamponade for proliferative vitreoretinopathy retinal detachment were included in this retrospective study. All patients underwent ophthalmologic examinations before treatment and 1 week and 1, 3, and 6 months after vitrectomy with silicone oil tamponade. Choroidal thickness was measured using enhanced depth imaging optical coherence tomography (Spectralis; Heidelberg Engineering) in a horizontal and vertical section beneath the fovea.
  
  
  RESULTS
  Choroidal thickness statistically significantly decreased till 3 months after pars plana vitrectomy with silicone oil tamponade: under the center of the fovea (P = 0.014) and in the temporal (P = 0.029), superior (P = 0.046), and inferior areas, determined at 1,500 μm from the center of the fovea (P = 0.030). After 6 months, the desired effect in the form of a decrease in the choroidal thickness was even more prominent, both under the center of the fovea (P < 0.001) and in the nasal (P < 0.001), temporal (P < 0.001), superior (P < 0.001), and inferior areas at 1,500 μm from the center of the fovea (P < 0.001).
  
  
  CONCLUSIONS
  Choroidal thickness is reduced in eyes receiving silicone oil intraocular tamponade. Silicone oil tamponade may have an impact on the structure and proper functioning of the choroid. The measurements of the choroidal thickness by optical coherence tomography might be a very good tool to detect early changes in choroidal thickness and impact the decision when to remove silicone oil.
authors.affiliation: *Ophthalmology Clinic of St. John Boni Fratres Lodziensis, Łódź, Poland; †Faculty of Health Sciences, Jan Kochanowski Memorial University of Kielce, Kielce, Poland; ‡Department of Ophthalmology, Children's Memorial Health Institute, Warsaw, Poland; and §Department of Intensive Care and Congenital Malformations of Neonates and Infants, Polish Mother's Memorial Hospital-Research Institute, Łódź, Poland.
authors.forename: Dominik
authors.initials: D
authors.lastname: Odrobina
authors.forename: Joanna
authors.initials: J
authors.lastname: Gołębiewska
authors.forename: Iwona
authors.initials: I
authors.lastname: Maroszyńska
mesh_terms: D002829:Choroid / Q000473:pathology*; D058450:Endotamponade / Q000379:methods*; D005260:Female; D005584:Fovea Centralis / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D012163:Retinal Detachment / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D012189:Retrospective Studies; D012827:Silicone Oils / Q000008:administration & dosage*; D041623:Tomography, Optical Coherence / Q000379:methods*; D014792:Visual Acuity; D014821:Vitrectomy / Q000379:methods*; D018630:Vitreoretinopathy, Proliferative / Q000175:diagnosis / Q000209:etiology / Q000601:surgery*
chemical_list: D012827:Silicone Oils