May 2007
Volume 48, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2007
Total Deviation Probability Plots for Size V Perimetry: A Comparison With Size III
Author Affiliations & Notes
  • K. R. Woodward
    Veterans Administration Hospital, Iowa City, Iowa
  • C. F. Brito
    Department of Psychology, Eastern Illinois University, Charleston, Illinois
  • C. K. Doyle
    Veterans Administration Hospital, Iowa City, Iowa
  • R. H. Kardon
    Veterans Administration Hospital, Iowa City, Iowa
    Department of Ophthalmology, University of Iowa, Iowa City, Iowa
  • C. A. Johnson
    Department of Ophthalmology, University of Iowa, Iowa City, Iowa
    Discoveries in Sight, Devers Eye Institute, Portland, Oregon
  • M. Wall
    Veterans Administration Hospital, Iowa City, Iowa
    Department of Ophthalmology, University of Iowa, Iowa City, Iowa
  • Footnotes
    Commercial Relationships K.R. Woodward, None; C.F. Brito, None; C.K. Doyle, None; R.H. Kardon, None; C.A. Johnson, None; M. Wall, None.
  • Footnotes
    Support VA Merit Review
Investigative Ophthalmology & Visual Science May 2007, Vol.48, 1620. doi:https://doi.org/
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    • Get Citation

      K. R. Woodward, C. F. Brito, C. K. Doyle, R. H. Kardon, C. A. Johnson, M. Wall; Total Deviation Probability Plots for Size V Perimetry: A Comparison With Size III. Invest. Ophthalmol. Vis. Sci. 2007;48(13):1620. doi: https://doi.org/.

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

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Abstract
 
Purpose:
 

To develop databases from a common set of normal participants for empiric probability plots for Humphrey size V and III testing and compare with the STATPACTM size III (SITA) database.

 
Methods:
 

We computed empiric probability plots from data collected from testing 60 normal participants (ages 40 - 78) on size III and size V testing. We then analyzed the probability plots of 120 Glaucoma patients (ages 38 - 81, mean deviation -6.67±4.4). We counted the number of test locations without and with loss at <1%, <2%, and <5% levels and compared the number of normal and abnormal test locations using size III vs. size V and size III results with Humphrey STATPACTM software results. Two-way repeated measures ANOVA was used to compare the number of normal and abnormal test locations among the three tests.

 
Results:
 

The graph shows the differences in the number of normal and abnormal test locations flagged by the three types of probability plots. There was no significant difference between size V and size III. At <2% and <5% loss, the number of abnormal test locations did not differ significantly among the tests. For the normal test locations, STATPACTM identified significantly more locations than size III; however, at <1% loss STATPACTM identified significantly fewer locations than size III.

 
Conclusions:
 

Size V full threshold testing gives a similar number of abnormal test locations in glaucoma patients. This may be due to its better retest variability and tighter confidence limits.  

 
Keywords: perimetry • visual fields 
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