June 1989
Volume 30, Issue 6
Free
Articles  |   June 1989
Variability of automated visual fields in clinically stable glaucoma patients.
Author Affiliations
  • E B Werner
    Department of Ophthalmology, Hahnemann University, Philadelphia, PA 19102.
  • B Petrig
    Department of Ophthalmology, Hahnemann University, Philadelphia, PA 19102.
  • T Krupin
    Department of Ophthalmology, Hahnemann University, Philadelphia, PA 19102.
  • K I Bishop
    Department of Ophthalmology, Hahnemann University, Philadelphia, PA 19102.
Investigative Ophthalmology & Visual Science June 1989, Vol.30, 1083-1089. doi:
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    • Get Citation

      E B Werner, B Petrig, T Krupin, K I Bishop; Variability of automated visual fields in clinically stable glaucoma patients.. Invest. Ophthalmol. Vis. Sci. 1989;30(6):1083-1089.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

The total variability of the visual field was measured in 20 patients with open-angle glaucoma who appeared to be clinically stable and well controlled on medical therapy. All patients had at least four visual fields performed on the Octopus 201 perimeter with at least 12 months follow-up since their first visual field. The four most recently performed visual fields were analyzed. Two different methods for calculating total variability were used. One was based on the variance of the threshold determinations and the other was based on the range. The average total variability per subject was 2.8 decibels (db) using the variance-based calculation and 5.1 db using the range-based calculation. Ninety-five percent of the test locations had a variability of less than 6 db by the variance-based calculation method and 13 db by the range-based calculation method. We discuss the possibility of using this type of data to develop criteria for detection of progressive visual field loss in glaucoma.

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