Zeiss Humphrey matrix User Manual page 51

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