Humphrey Zeiss FDT 710

Weight Less than 9 kg [20 lbs.]
Patient size display 40° horizontal by 40° vertical square
Feed 115/230V~, 50/60Hz, 0.4/0.2A,
Power cord Approved power cord
Printer high speed, high resolution internal thermal printer
Temperature -20°C to +49°C,
Humidity 0% to 95% non-condensing
Pressure 700 hPa to 1060 hPa
Altitude Up to 3000 m above sea level
Contrast values P = 5% (2 times), p = 1%, maximum contrast
Initial contrast p = 0.5% contrast level
Monitoring fixing Heijl-Krakau mounting monitor
Capture Test Contrast 6dB (~50%)
Presentation order Random
Pattern 1° circular diameter stimulus FDT
Contrast capture assays 56dB (~0%)
Boss 1 of 17 FDT Patterns, Random
Spatial frequency 0.25 cycles/degree, cosine modulation
Temporal frequency 25 Hz flicker counter phase
Duration 200 to 400ms
Color black and white
Average background illumination 100cd/m2 nominal
Contrast range 56 dB (~0%) to 0 dB (~100%) in log10 steps
Internal interstimuli 0 to 500 ms, Random

Key features of the FDT visual field instrument include:
• Supra-threshold screening tests in less than 1 minute per eye
• Threshold tests in approximately 4 minutes per eye
• Easy to use; no special training is required / minimal operator instruction
• No correction (trial) lens required; patients can wear their own patch or none at all
(Must only be 6D from patient's refraction)
• No eye patch needed for opposite (untested) eye - it is automatically occluded
• No affected by ambient lighting - can be used in normal bedroom lighting
• Not affected by pupil size (as small as 2mm)
• Extensive normative age reference database incorporated
• World-class clinical validation by leading researchers in the field
• Software upgradeability for future enhancements

Instrument
Dimensions: 25 cm [10''] wide x 48cm [19''] deep x 43cm [17''] high
Electrical connection: 320-IEC standard power inlet connector for worldwide use
Computer interface: RS-232 series D 9 male connector pins, null-modem cable,
Operating Conditions
Storage and Shipping Conditions

Test
Screening Strategies Test:
• Supra-threshold 20° (SCREENING C-20 - 1)
• Supra-Threshold 20° (SCREENING C-20 - 5)
• Supra-Threshold 20° (SCREENING N-30 - 1)
• Supra-Threshold 20° (SCREENING N-30 - 5)

Strategies Threshold Test :
• Threshold 20° (THRESHOLD C-20)
• Nasal Threshold 30° (THRESHOLD N-30)
• MONSTERS computer automated stairway thresholding procedure
• Staircase completion consists of at least four stairway occasions plus upper and lower
limits of stairs within 0.3 log10 units of each other.
• MONSTERS threshold is calculated as the average of the last upper and last lower submissions meeting the staircase completion criteria.

Reliability indices:
• 3 capture trials in C-20 and N-30 screening tests
• 6 capture trials in THRESHOLD TESTS C-20 and N-30
• False positive capture trials:
• 6 capture trials in THRESHOLD C-20 TEST
• 8 capture trials in THRESHOLD N-30 TEST
• False negative capture trials :
• contrast capture test 0 dB (~ 100%)
• 3 capture tests in SEUIL C-20 TEST
• 5 capture tests in SEUIL N-30 TEST

Stimulus:
• 17 or 19 FDT models as well as test models fixation capture DO and OS (4 patterns per field visual quadrant plus a 5° center ray pattern)
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 capture
ratios False Positive Test

Results Threshold Test:
• Threshold (dB) Plot
• Deviation Plot with 5 probability level classifications (P>=5%, P