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Related Experiment Videos

Evaluation of the Humphrey FASTPAC threshold program in glaucoma

C O'Brien1, D Poinoosawmy, J Wu

  • 1Glaucoma Unit, Moorfields Eye Hospital, London.

The British Journal of Ophthalmology
|July 1, 1994
PubMed
Summary

The new FASTPAC visual field test is 35% faster than the standard program for glaucoma patients. However, it is less accurate in measuring visual field loss, potentially impacting diagnosis.

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Area of Science:

  • Ophthalmology
  • Visual electrophysiology

Background:

  • Prolonged perimetry can lead to patient fatigue and reduced test performance.
  • The Humphrey visual field analyzer is a standard tool for assessing glaucoma progression.

Purpose of the Study:

  • To compare the performance of a new rapid thresholding program, FASTPAC, with the standard Humphrey visual field analyzer program (24-2).
  • To evaluate the accuracy and efficiency of FASTPAC in glaucoma patients.

Main Methods:

  • A comparative study involving 44 glaucoma patients.
  • FASTPAC program was tested against the standard Humphrey program 24-2.
  • Key metrics analyzed included test time, mean deviation (MD), corrected pattern standard deviation (CPSD), short-term fluctuation, and reliability indices.

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Main Results:

  • FASTPAC significantly reduced mean test time by 35% (12.6 to 8.2 minutes).
  • FASTPAC underestimated MD (p=0.007) and CPSD (p=0.005) compared to the standard program.
  • Measurement errors were consistent across early and advanced visual field loss.
  • No significant differences were observed in short-term fluctuation or reliability indices.

Conclusions:

  • FASTPAC offers a considerable reduction in testing time, potentially improving patient compliance and test completion rates.
  • Despite its speed advantage, FASTPAC demonstrates reduced accuracy in measuring retinal sensitivity compared to the standard program.
  • The trade-off between speed and accuracy needs consideration for clinical application in glaucoma management.