title: Relation between blue-on-yellow perimetry and optical coherence tomography in normal tension glaucoma.
abstract: OBJECTIVE
  To assess the relation between blue-on-yellow perimetry (B/YP) indices and optical coherence tomography (OCT) parameters in normal tension glaucoma (NTG) patients and to investigate the diagnostic ability of B/YP and OCT in discriminating NTG from normal eyes.
  
  
  METHODS
  Cross-sectional study.
  
  
  METHODS
  Eighty normal subjects (80 eyes) and 80 NTG patients (80 eyes) were enrolled in the study.
  
  
  METHODS
  All patients underwent white-on-white perimetry, B/YP, and OCT measurement. The correlation between B/YP indices and OCT parameters was analyzed. The area of the receiver operating characteristic (ROC) curve was calculated to discriminate NTG patients from normal subjects.
  
  
  RESULTS
  A highly significant correlation was found between B/YP mean deviation (MD) and average thickness of the retinal nerve fibre layer (r2 = 0.707, p = 0.000), and a moderately significant correlation was found between B/YP MD and temporal average (r2 = 0.437, p = 0.010) in the early NTG patients. A mildly or moderately significant correlation was found between B/YP MD and average thickness, inferior average, temporal average, superior maximum, and maximum-minimum (r2 = 0.212-0.498, p = 0.001-0.048) in the moderate or late NTG patients. The area under the ROC curve at the B/YP MD was 0.896, and the 3 OCT parameters with the widest area under the curve were average thickness (0.957), inferior average (0.932), and superior average (0.913). Average thickness showed the highest sensitivity (93%) with specificities at 90% and 80%.
  
  
  CONCLUSIONS
  The significant correlation between B/YP indices and OCT parameters in NTG patients suggests that the 2 tests detect similar areas or amounts of NTG damage and could be used for NTG early diagnosis.
authors.affiliation: Department of Ophthalmology, Ruijin Hospital Affiliated Shanghai Jiaotong University, Shanghai, China. yszhong68@yahoo.com.cn
authors.forename: Yisheng
authors.initials: Y
authors.lastname: Zhong
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Zhou
authors.forename: Yu
authors.initials: Y
authors.lastname: Cheng
authors.forename: Lieqin
authors.initials: L
authors.lastname: Xie
mesh_terms: D019540:Area Under Curve; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D057066:Low Tension Glaucoma / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D009412:Nerve Fibers / Q000473:pathology*; D009898:Optic Disk / Q000473:pathology*; D009901:Optic Nerve Diseases / Q000175:diagnosis*; D012372:ROC Curve; D012165:Retinal Ganglion Cells / Q000473:pathology*; D012680:Sensitivity and Specificity; D041623:Tomography, Optical Coherence; D058609:Visual Field Tests; D014794:Visual Fields