title: Refractive changes in silicone oil-filled pseudophakic eyes.
abstract: OBJECTIVE
  We examined the refractive changes in pseudophakic eyes of patients with idiopathic macular hole treated with silicone oil injection.
  
  
  METHODS
  Twenty consecutive eyes of 19 patients with idiopathic macular hole who had undergone successful pars plana vitrectomy using silicone oil tamponade were studied retrospectively. Lensectomy with intraocular lens (IOL) implantation was performed on each patient before vitreous surgery. Five biconvex type IOL models were used. After pars plana vitrectomy and fluid-air exchange, silicone oil was injected to replace the air completely. Macular hole closure was confirmed by optical coherence tomography, and silicone oil removal was performed. Manifest refractions before silicone oil filling, with silicone oil filling, and after silicone oil removal were determined.
  
  
  RESULTS
  A mean hyperopic shift +/- SD in spherical equivalents of +5.69 +/- 1.71 diopters (P < 0.0001) was observed with silicone oil instillation. In contrast, a mean myopic shift +/- SD of -5.63 +/- 1.33 diopters was observed after silicone oil removal (P < 0.0001). The absolute value of the refractive shift showed a strong correlation with the posterior radius of the IOL (r = 0.699, P < 0.0001).
  
  
  CONCLUSIONS
  IOL models with steeper posterior convex curvature result in larger refractive deviations in patients scheduled for silicone oil instillation.
authors.affiliation: Department of Ophthalmology, Kameda Medical Center, Chiba, Japan. kahotta@kameda.jp
authors.forename: Kazuki
authors.initials: K
authors.lastname: Hotta
authors.forename: Atsuhiko
authors.initials: A
authors.lastname: Sugitani
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D006956:Hyperopia / Q000139:chemically induced*; D019654:Lens Implantation, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D019591:Pseudophakia / Q000150:complications*; D012029:Refraction, Ocular; D012167:Retinal Perforations / Q000175:diagnosis / Q000188:drug therapy; D012827:Silicone Oils / Q000009:adverse effects*; D041623:Tomography, Optical Coherence; D014792:Visual Acuity; D014821:Vitrectomy
chemical_list: D012827:Silicone Oils