title: Verification of posterior hyaloid status during pars plana vitrectomy, after preoperative evaluation on optical coherence tomography.
abstract: BACKGROUND
  The purpose of the study is to establish the accuracy of optical coherence tomography (OCT) in visualizing the presence or absence of vitreopapillary adhesion.
  
  
  METHODS
  This is a prospective, interventional case series based at Calderdale Royal Hospital and Huddersfield Royal Infirmary, both district general hospitals in the United Kingdom. Fifty consecutive eyes of 50 patients listed for vitrectomy surgery that showed media clear enough to enable adequate visualization of the fundus were included. All patients underwent assessment of posterior hyaloid status by OCT imaging of the optic disk. All OCT images were assessed by two observers, and preoperative OCT data were compared with intraoperative observations. Statistical analysis was performed using the Cohen κ coefficient to measure the interrater agreement.
  
  
  RESULTS
  There was 100% agreement between Observer 1 and 2. Cohen κ was 0.95 and (95% confidence interval, 0.84-1.05) for agreement between preoperative OCT and intraoperative findings.
  
  
  CONCLUSIONS
  Optical coherence tomography imaging can accurately visualize the vitreopapillary interface. Our results show a strong correlation between OCT and intraoperative findings. The presence of a posterior vitreous detachment would be useful knowledge to the vitreoretinal surgeon in planning surgery and weighing up the risk of developing certain conditions.
authors.affiliation: Department of Ophthalmology, Calderdale Royal Hospital, Halifax, UK.
authors.forename: Rubina
authors.initials: R
authors.lastname: Rahman
authors.forename: Rishika
authors.initials: R
authors.lastname: Chaudhary
authors.forename: Nitin
authors.initials: N
authors.lastname: Anand
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008297:Male; D015588:Observer Variation; D057234:Preoperative Period; D011446:Prospective Studies; D012164:Retinal Diseases / Q000175:diagnosis*; D041623:Tomography, Optical Coherence / Q000379:methods*; D014821:Vitrectomy / Q000379:methods; D014822:Vitreous Body / Q000473:pathology*