Specifications
Humphrey FDT User Manual
2660021149532 Rev. B 2015-11
6-2
Reliability Indices:
• Fixation Monitoring: Heijl-Krakau fixation monitor
• Catch trial contrast: 6 dB (~ 50%)
• 3 catch trials in SCREENING C-20 and N-30 TESTS
• 6 catch trials in THRESHOLD C-20 and N-30 TESTS
• Presentation Order: Pseudo-Random
• Pattern: 1° diameter circular FDT stimulus
• False Positive Catch Trials:
• Catch trials contrast: 56 dB (~ 0%)
• 3 catch trials in SCREENING C-20 and N-30 TESTS
• 6 catch trials in THRESHOLD C-20 TEST
• 8 catch trials in THRESHOLD N-30 TEST
• Presentation Order: Pseudo-Random
• False Negative Catch Trials:
• Catch trial contrast 0 dB (~ 100%)
• 3 Catch trials in THRESHOLD C-20 TEST
• 5 Catch trials in THRESHOLD N-30 TEST
• Presentation Order: Pseudo-Random
• Pattern: 1 of 17 FDT Patterns, Random
Stimulus:
• 17 or 19 FDT patterns plus OD and OS fixation catch trial patterns (4 patterns per visual field
quadrant plus a central 5° radius pattern)
• Presentation Order: Random
• Spatial Frequency: 0.25 cycles/degree, cosinusoidal modulation
• Temporal Frequency: 25 Hz counter-phase flicker
• Duration: 200 to 400 ms
• Color: black and white
• Mean Background Illumination: 100 cd/m
2
nominal
• Contrast Range: 56 dB (~ 0%) to 0 dB (~ 100%) in log
10
steps
• Interstimulus Internal: 0 to 500 ms, Random
Screening Test Results:
• Deviation Plot with 4 qualitative loss classifications (Within Normal Limits, Mild Relative Loss,
Moderate Relative Loss, Severe Loss) based on age-related normative references
• Reliability Indices: Fixation and False Positive Catch Trials ratios
Threshold Test Results:
• Threshold (dB) Plot
• Deviation Plot 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
Содержание Humphrey FDT 710
Страница 1: ...Humphrey FDT Model 710 User Manual...
Страница 19: ...Humphrey FDT User Manual 2660021149532 Rev B 2015 11 Introduction 2 7 Patient Video Screen Patterns...
Страница 20: ...Introduction Humphrey FDT User Manual 2660021149532 Rev B 2015 11 2 8...
Страница 38: ...Operation Humphrey FDT User Manual 2660021149532 Rev B 2015 11 3 18 Screening C 20 Test Result Sample...
Страница 39: ...Humphrey FDT User Manual 2660021149532 Rev B 2015 11 Operation 3 19 Threshold C 20 Test Results Sample...
Страница 40: ...Operation Humphrey FDT User Manual 2660021149532 Rev B 2015 11 3 20 Threshold N 30 Test Results Sample...
Страница 50: ...Service Information Humphrey FDT User Manual 2660021149532 Rev B 2015 11 5 2...
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