title: Evaluation of anterior segment parameters using pentacam in silicone oil-injected patients after pars plana vitrectomy.
abstract: BACKGROUND
  The aim of this study is to evaluate anterior segment changes with Pentacam Scheimpflug camera after pars plana vitrectomy (PPV) and silicone oil injection.
  
  
  METHODS
  In all, 44 eyes of 44 patients who underwent PPV by one surgeon were evaluated with Pentacam preoperatively, first week, and first month after surgery. The patients were divided into two groups, eyes with silicone injection after PPV and eyes with PPV and no endotamponade. Main outcome measures were preoperative and postoperative anterior chamber volume (ACV), anterior chamber depth (ACD), anterior chamber angle (ACA), and central corneal thickness (CCT) obtained with pentacam.
  
  
  RESULTS
  Each group consisted of 22 patients. In both groups no significant difference was detected among preop and postop changes in ACV and ACA values (p > 0.05). The increase in ACD in silicone oil-injected group and the decrease in ACD in PPV group at postop 1 week were statistically significant (p < 0.05). The increase in CCT in silicone oil-injected group at postop 1 week and then decrease in postop 1 month were also significant (p < 0.05). Surgically induced astigmatism (SIA) was 3.7 Dioptry (D) in silicone oil-injected group and 2.4 D in PPV group at postop 1 week. SIA decreased to 1.7 D and 1.5 D, respectively, at postop 1 month. Changes in SIA were significant (p < 0.05).
  
  
  CONCLUSIONS
  PPV effects cornea and anterior segment. Changes in cornea and anterior segment after PPV seem to return to preoperative values among 1 month after surgery.
authors.affiliation: Dünya Göz Hospital, Istanbul, Turkey.
authors.forename: Burcu
authors.initials: B
authors.lastname: Çalik
authors.forename: Muzaffer
authors.initials: M
authors.lastname: Öztürk
authors.forename: Hüseyin
authors.initials: H
authors.lastname: Serdarogullari
authors.forename: Mustafa
authors.initials: M
authors.lastname: Elçioglu
mesh_terms: D000869:Anterior Eye Segment / Q000473:pathology*; D003315:Cornea / Q000473:pathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007267:Injections; D008297:Male; D008875:Middle Aged; D010781:Photography / Q000295:instrumentation*; D011184:Postoperative Period; D012164:Retinal Diseases / Q000601:surgery*; D012827:Silicone Oils / Q000008:administration & dosage*; D041623:Tomography, Optical Coherence; D014821:Vitrectomy
chemical_list: D012827:Silicone Oils