Troubleshooting
HFA3 Instructions for Use
2660021166131 Rev. A 2018-11
C-4
Inconsistent labeling on the SFA GPA report.
• Only occurs on 30-2 tests generated on the HFA3. If GPA analysis is based on prior 24-2
tests, pattern label for the Progression Analysis Probability Plot should be 24-2 but is
displayed as 30-2.
Blind Spot Monitor
Cannot change Blind Spot size.
• HFA3 uses same stimulus size for testing and Blind Spot check.
Cannot locate blind spot.
• Realign patient.
• Verify that proper eye is being tested.
• Check to make sure the patient’s non-testing eye is occluded.
• Make sure patient is fixating on fixation light.
• Select Restart in the Gaze Initialization box to restart the test.
• Turn off Blind Spot Monitoring.
Gaze Tracking
Gaze Tracking will not initialize.
• HFA3 is Model 830.
• Make sure that three distinct corneal reflections are visible when using no lenses or a
manual trial lens. Two reflections should be visible with the Liquid Trial Lens.
• Make sure that the center of the pupil is aligned with the monitor or the center of the
lens and that the edges of the pupil are clearly visible.
• Avoid spurious reflections near the pupil by adjusting patient alignment and/or trial lens.
• High power trial lens being used may cause large corneal reflections. Try moving the lens
away from the eye by 3mm. To avoid trial lens artifacts do not move too far back.
• Droopy eyelid - ask patient to open eye wider during initialization.
• Interfering eyelashes - ask patient to open eye wider during initialization.
• Small pupils.
• Excessive eye movement or blinking.
• Excessively large or dilated pupils.
• Dry eyes, cloudy media or dark iris.
• Deep-set eyes.
Large Gaze Tracking errors or Not Detected marks. • Gaze errors on the HFA3 graph look larger than those on older HFA models.
• Patient not fixated properly at the central location during gaze initialization.
• Eye position has drifted away from the original position. Realign the patient.
• Make sure that three distinct corneal reflections are visible when using no lenses or a
manual trial lens. Two reflections should be visible with the Liquid Trial Lens.
• Make sure that the center of the pupil is aligned with the monitor or the center of the
lens and that the edges of the pupil are clearly visible.
• Avoid spurious reflections near the pupil by adjusting patient alignment and/or trial lens.
• Droopy eyelid - ask patient to open eye wider.
• Interfering eyelashes - ask patient to open eye wider.
• Small pupils.
• Excessive eye movement or blinking.
• Excessively large or dilated pupils.
• Dry eyes, cloudy media or dark iris.
• Deep-set eyes.
Head Tracking
Head Tracking does not work.
• HFA3 not Models 840, 850, or 860.
• Head Tracking not turned on.
• Trial lens holder not in up position.
• Gaze Tracking was not initialized at the start of the test.
Head Tracking alarm activates too often.
• Patient’s chin not moving with the chin rest - re-instruct patient.
• Reset Head Tracking.
• Turn off Head Tracking.
Table C-2
Problem
Possible Cause or Solution
