title: [Comparitive study of the threshold variability between blue-on-yellow perimetry and white-on-white perimetry].
abstract: OBJECTIVE
  To compare the threshold variability of blue-on-yellow (B/Y) perimetry with white-white(W/W) perimetry, and evaluate the reproducibility of B/Y perimetry.
  
  
  METHODS
  The B/Y perimetry and W/W perimetry in the Octopus 101 perimetry were used to examine the visual fields of 12 normal subjects (24 eyes), 16 cases (32 eyes) of primary open angle glaucoma (POAG), and 7 cases (14 eyes) of suspected POAG respectively. The B/Y perimetry and W/W perimetry were repeated to examine within 2 weeks. The point by point threshold variability of the two perimetries were compared and analysed.
  
  
  RESULTS
  The total mean threshold variability for B/Y perimetry (2.61 +/- 0.94) dB was greater than that for W/W perimetry (2.11 +/- 0.90) dB in all subjects, but it had no significance (P = 0.6244). The total mean threshold variability for B/Y perimetry (2.07 +/- 0.54) dB was significantly greater than that for W/W perimetry (1.50 +/- 0.34) dB in normal subjects (P = 0.0006), while no significance was found in suspected POAG and POAG groups between the two perimetries (P = 0.0523 and 0.9371). The threshold variability in the areas of some eccentricities for B/Y perimetry were significantly greater than that for W/W perimetry in normal subjects and suspected POAG group, but no significance was found in POAG group for all eccentricities between the two perimetries.
  
  
  CONCLUSIONS
  The threshold variability for B/Y perimetry was greater than that for W/W perimetry in normal subjects, but no significance was found in suspected POAG and POAG between the two perimetries.
authors.affiliation: The Ophthalmology Department, Ruijin Hospital Affiliated Shanghai Second Medical University, Shanghai 200025, China.
authors.forename: Yisheng
authors.initials: Y
authors.lastname: Zhong
authors.forename: Wen
authors.initials: W
authors.lastname: Ye
authors.forename: Jun
authors.initials: J
authors.lastname: Gao
authors.forename: Fangzhi
authors.initials: F
authors.lastname: Yu
authors.forename: Kangsun
authors.initials: K
authors.lastname: Wang
mesh_terms: D000328:Adult; D005260:Female; D005902:Glaucoma, Open-Angle / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity; D012684:Sensory Thresholds; D058609:Visual Field Tests / Q000379:methods*; D014796:Visual Perception