title: Learning effect of Humphrey Matrix perimetry.
abstract: BACKGROUND
  Humphrey Matrix perimetry is a recent development in automated perimetry that uses frequency-doubling technology (FDT). We evaluated the learning effect of Humphrey Matrix perimetry with a full-threshold 30-2 strategy.
  
  
  METHODS
  Twenty-four patients with primary open-angle glaucoma and early visual field defects as assessed by standard automated perimetry and 24 healthy control subjects participated. All subjects had no prior experience with FDT visual field tests. Humphrey Matrix perimetry using a full-threshold 30-2 strategy was performed 3 times within 1 month. Various visual field indices were compared across multiple tests.
  
  
  RESULTS
  Mean deviation (MD) showed a larger defect at the first test than at the second and third tests (p < 0.001), and the mean total improvement of the MD was 2.80 decibels (dB) in the glaucoma group and 1.71 dB in the control group. Pattern standard deviations (PSDs) were decreased as the tests were repeated, but test duration, fixation losses, and false-positive or false-negative rate were not changed significantly. Additionally, the Glaucoma Hemifield Test (GHT) showed unstable results.
  
  
  CONCLUSIONS
  In patients naive to the FDT test, Humphrey Matrix perimetry showed a large learning effect on MD and PSD among the various visual field indices. The GHT results of Humphrey Matrix perimetry showed a large instability.
authors.affiliation: Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Samin
authors.initials: S
authors.lastname: Hong
authors.forename: Kyungdoo
authors.initials: K
authors.lastname: Na
authors.forename: Chan Yun
authors.initials: CY
authors.lastname: Kim
authors.forename: Gong Je
authors.initials: GJ
authors.lastname: Seong
mesh_terms: D000328:Adult; D005260:Female; D005902:Glaucoma, Open-Angle / Q000503:physiopathology* / Q000523:psychology; D006801:Humans; D007858:Learning; D008297:Male; D010353:Patient Education as Topic; D015203:Reproducibility of Results; D058609:Visual Field Tests / Q000523:psychology*; D014794:Visual Fields