Humphrey Matrix Visual Field Instrument
47
Rev. D 08/21/06 PN 701692
Threshold Test Results
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Threshold (dB) Plot
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Gray Scale Plot
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Total and Pattern Deviation (dB) Plots
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Total and Pattern Deviation Probability Plots with 5 probability level classifications (P> = 5%, P
< 5%, P<2%, P<1%, P<0.5%) based on age-related normative references
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MD (Mean Deviation) and PSD (Pattern Standard Deviation) statistical Global Indices values
with 5 probability level classifications (P> = 5%, P<5%, P<2%, P<1%, P<0.5%) based on
age-related normative references
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Reliability Indices: Fixation, False Positive, and False Negative Catch Trials ratios
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Glaucoma Hemifield Test (GHT) for 24-2 & 30-2 threshold tests
Screening Test Results
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Total Deviation Plot with 4 loss classifications for N-30-5 (-1) screening test, 2 loss
classifications for 24-2-5 (-1) screening test
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Reliability Indices: Fixation and False Positive
Reliability Measures
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Fixation Monitoring: Heijl-Krakau method
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Catch trial contrast: 25%
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Presentation Order: Pseudo-Random
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Pattern: approximately one degree diameter circular FDT stimulus
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False Positive Catch Trials:
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Catch trials contrast: 0%
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Presentation Order: Pseudo-Random
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Pattern: one of the FDT stimuli in test pattern presented in a random location
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False Negative Catch Trials:
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Catch trial contrast: 100%
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Presentation Order: Pseudo-Random
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Pattern: one of the FDT stimuli in test pattern presented in a random location where the patient
has previously responded (when possible)
Stimulus
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Presentation Order: Random
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Duration: 300 ms nominal
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Cosinusoidal counter-phase flicker modulation
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Color: black and white
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Mean Background Illumination: 100 cd/m2 nominal
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Contrast range N-30 tests:
56 dB (~ 0%) to 0 dB (~ 100%),
(~40 dB is the maximum human visual field sensitivity)
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Contrast range 24-2, 30-2, 10-2 & Macula tests:
38 dB (~ 0%) to 0 dB (~ 100%)
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Optical system: Badal type
Summary of Contents for Humphrey matrix
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