title: Pattern electroretinogram and psychophysical tests of visual function for discriminating between healthy and glaucoma eyes.
abstract: OBJECTIVE
  To compare the diagnostic accuracy of the pattern electroretinogram (pattern ERG) to that of standard automated perimetry (SAP), short-wavelength automated perimetry (SWAP), and frequency-doubling technology (FDT) perimetry for discriminating between healthy and glaucomatous eyes.
  
  
  METHODS
  Cross-sectional study.
  
  
  METHODS
  Eighty-three eyes of 42 healthy recruits and 92 eyes of 54 glaucoma patients (based on optic disc appearance) from the University of California, San Diego, Diagnostic Innovations in Glaucoma Study were tested with pattern ERG for glaucoma detection (PERGLA; Lace Elettronica, Pisa, Italy), SAP, SWAP, and FDT within 9 months. Receiver operating characteristic (ROC) curves were generated and compared for pattern ERG amplitude and SAP, SWAP, and FDT mean deviation and pattern standard deviation (PSD). Sensitivities and specificities were compared and agreement among tests was described.
  
  
  RESULTS
  The area under the ROC curve for pattern ERG amplitude was 0.744 (95% confidence interval = 0.670, 0.818). The ROC curve area was 0.786 (0.720, 0.853) for SAP PSD, 0.732 (0.659, 0.806) for SWAP PSD, and 0.818 (0.758, 0.879) for FDT PSD. At 95% specificity, sensitivities of SAP and FDT PSD were significantly higher than that of pattern ERG amplitude; at 80% specificity, similar sensitivities were observed among tests. Agreement among tests was slight to moderate.
  
  
  CONCLUSIONS
  The diagnostic accuracy of the pattern ERG amplitude was similar to that of SAP and SWAP, but somewhat worse than that of FDT. Nevertheless, the pattern ERG may hold some advantage over psychophysical testing because of its largely objective nature.
authors.affiliation: Hamilton Glaucoma Center and Department of Ophthalmology, University of California at San Diego, La Jolla, California 92093-0946, USA.
authors.forename: Ali
authors.initials: A
authors.lastname: Tafreshi
authors.forename: Lyne
authors.initials: L
authors.lastname: Racette
authors.forename: Robert N
authors.initials: RN
authors.lastname: Weinreb
authors.forename: Pamela A
authors.initials: PA
authors.lastname: Sample
authors.forename: Linda M
authors.initials: LM
authors.lastname: Zangwill
authors.forename: Felipe A
authors.initials: FA
authors.lastname: Medeiros
authors.forename: Christopher
authors.initials: C
authors.lastname: Bowd
mesh_terms: D000368:Aged; D019540:Area Under Curve; D003430:Cross-Sectional Studies; D004596:Electroretinography; D005260:Female; D005902:Glaucoma, Open-Angle / Q000175:diagnosis*; D006801:Humans; D007429:Intraocular Pressure; D008297:Male; D008875:Middle Aged; D009901:Optic Nerve Diseases / Q000175:diagnosis*; D012372:ROC Curve; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014065:Tonometry, Ocular; D058609:Visual Field Tests