April 2010
Volume 51, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2010
A Comparison of Detection Rates Using Total Deviation Probability Plots for SAP Sizes III and V, Motion Perimetry and Matrix
Author Affiliations & Notes
  • M. Wall
    Veterans Affairs Medical Center and Department of Neurology, University of Iowa, College of Medicine and VA Hospital, Iowa City, Iowa City, Iowa
  • C. K. Doyle
    Veterans Affairs Medical Center and Ophthalmology and Visual Sciences,
    University of Iowa, College of Medicine, Iowa City, Iowa
  • C. A. Johnson
    Department of Ophthalmology and Visual Sciences,
    University of Iowa, College of Medicine, Iowa City, Iowa
  • K. R. Woodward
    Department of Ophthalmology and Visual Sciences,
    University of Iowa, College of Medicine, Iowa City, Iowa
  • C. F. Brito
    Department of Psychology, Eastern Illinois University, Charleston, Illinois
  • Footnotes
    Commercial Relationships  M. Wall, None; C.K. Doyle, None; C.A. Johnson, Welch Allyn, C; K.R. Woodward, None; C.F. Brito, None.
  • Footnotes
    Support  VA Merit Review
Investigative Ophthalmology & Visual Science April 2010, Vol.51, 5503. doi:
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      M. Wall, C. K. Doyle, C. A. Johnson, K. R. Woodward, C. F. Brito; A Comparison of Detection Rates Using Total Deviation Probability Plots for SAP Sizes III and V, Motion Perimetry and Matrix. Invest. Ophthalmol. Vis. Sci. 2010;51(13):5503.

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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 probability plots for Humphrey size III, size V, Motion Perimetry and Matrix Perimetry; to compare the normal and abnormal probability plot results of the 4 perimetric tests.

 
Methods:
 

We computed empiric probability plots from data collected from testing 60 common normal participants (ages 40 - 78) with the four perimetry types above. 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 from our normative databases using the four tests (Figure). We used two-way repeated measures ANOVA to compare the counts of normal and abnormal test locations among the tests.

 
Results:
 

The graph shows the differences in the number of normal and abnormal test locations flagged by the four tests’ probability plots (average of two visits). For the number of normal test locations, sizes III and V were not significantly different from each other. But both III and V were significantly different from Motion and Matrix (all at p<.001); Matrix had significantly fewer normal test locations than the other tests (p<.001).

 
Conclusions:
 

While clinically significant differences among the tests were small (of the order of 2-3 abnormal test locations per visual field exam), Matrix testing produced significantly more abnormal test locations.  

 
Keywords: visual fields • perimetry • optic nerve 
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