VISUAL FIELD ZEISS-HUMPHREY FDT 710

Key features of the FDT visual field instrument include: - Supra-threshold screening tests in less than 1 minute per eye - Threshold tests at around 4 minutes per eye - Easy to use; no special training required / minimal operator instruction - No correction (trial) lens required; patients can wear their own correction or none at all (Must only be within 6D of patient's refraction) - No eye correction required for the opposite (untested) eye - it is automatically occluded - Unaffected by ambient lighting - can be used in normal room lighting - Unaffected by pupil size (as small as 2 mm) - Extensive built-in normative age reference database - world-class clinical validation by leading researchers in the field - software upgradeability for future enhancements Instrument Dimensions: 25 cm [10 ''] wide x 48 cm [19 ''] deep x 43 cm [17 ''] high Electrical connection: 320-IEC standard power input connector for worldwide use Computer interface: RS-232 serial D 9-pin male connector, 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) Test threshold strategies: - Threshold 20° (THRESHOLD C-20) - Nasal Threshold 30 ° (THRESHOLD N-30) - computer MONSTERS automated staircase thresholding procedure - Staircase completion consists of at least four staircase repeats as well as upper and lower staircases stair limits within 0.3 log10 units of each other. - MONSTER threshold is calculated as the average of the last upper and lower presentations meeting the staircase completion criteria. Reliability indices: - 3 capture trials in C-20 and N-30 screening tests - 6 capture trials in SEUIL TESTS C-20 and N-30 - False positive capture tests: - 6 capture tests in SEUIL C-20 TESTS - 8 capture tests in SEUIL N-30 TEST - False negative capture tests: - capture test contrast 0 dB (~ 100% ) - 3 capture trials in SEUIL C-20 TEST - 5 capture trials in SEUIL N-30 TEST Stimulus: - 17 or 19 FDT patterns plus OD and OS capture fixation trial patterns (4 patterns per visual field quadrant plus a 5° central radius pattern) Screening Test results: - Field of Deviation 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 capture test ratios Results Test threshold: - 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 of Standard Deviation) global statistics Value indices 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 capture test reports