title: Comparison of Fastpak with full-threshold 24-2 glaucoma field tests.
abstract: OBJECTIVE
  The authors noted an underestimation of the mean deviation for field testing using the Fastpak (Humphrey Instruments, San Leandro, CA) strategy, and set out to define the extent of this difference.
  
  
  METHODS
  Sixty-seven eyes of 35 glaucomatous patients were examined. Patients received full-threshold 24-2 tests before and after the Fastpak strategy was used, each test on a different day. For some patients, another full-threshold test was performed using a different birth date in order to obtain a result uninfluenced by prior data.
  
  
  RESULTS
  The mean deviation (MD) was significantly underestimated by Fastpak compared with the full-threshold tests. The time taken for Fastpak was almost identical to that taken for full-threshold tests. Short-term fluctuation (SF) appeared to have very little reliability statistically, and, consistent with this, there was a greater concordance among pattern standard deviation (PSD) data than among corrected pattern standard deviation (CPSD) data.
  
  
  CONCLUSIONS
  Fastpak was an effective method for charting the visual field, but did so with greater variation than full-threshold tests. It significantly underestimated the MD, and this was not a fatigue effect. Fastpak was no faster than full-threshold testing in advanced glaucoma. CPSD was a less consistent reading than PSD in these glaucomatous patients.
authors.affiliation: Royal Victorian Eye and Ear Hospital, East Melbourne, Victoria, Australia.
authors.forename: B
authors.initials: B
authors.lastname: Gillies
authors.forename: M
authors.initials: M
authors.lastname: Rivers
authors.forename: A M
authors.initials: AM
authors.lastname: Brooks
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005500:Follow-Up Studies; D005901:Glaucoma / Q000503:physiopathology*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008452:Maximum Allowable Concentration; D008875:Middle Aged; D011237:Predictive Value of Tests; D011379:Prognosis; D014786:Vision Disorders / Q000503:physiopathology*; D058609:Visual Field Tests / Q000379:methods*; D014794:Visual Fields