Zeiss HUMPHREY 720i, User Manual

Page: 102 / 328

REV. B 02/03 PN 51680-1 HUMPHREY FIELD ANALYZER II -
i
series
TESTING
5-12
TURN OFF BLIND SPOT MONITOR
Press this button to turn off the Heijl-Krakau method of Blind Spot Monitoring. If Gaze/Blind
Spot had been chosen at the start of the test and gaze tracking is initialized, the gaze tracking
will continue to monitor fixation while the blind spot monitor is turned off. If both gaze
tracking and blind spot monitoring are turned off, you can visually assess the patient’s ability to
fixate by observing with the video eye monitor.
RE-TRY TO FIND BLIND SPOT
This will initiate discovery of the patient’s blind spot by using the stimulus to search in the area
of the blind spot for the exact location. This is sometimes necessary, for example, when the
patient’s head tilts during the test.
TURN OFF ALL FIXATION MONITORING
This will turn off both Gaze Tracking and Blind Spot Monitoring if pressed. In this case, you
can monitor the patient’s fixation by watching the video eye monitor for the duration of the test.
Both Head Tracking and Vertex Monitoring will be turned off as well when Gaze Tracking is
discontinued.
TURN OFF GAZE TRACKING
This will turn off the Gaze Tracking device as well as Head Tracking and Vertex Monitoring for
the current test. Blind spot monitoring is not affected.
TURN OFF HEAD TRACKING
Only Head Tracking will be turned off by pressing this button.
TURN OFF VERTEX MONITORING
Only the Vertex Monitor will be turned off by pressing this button.
Note: Putting the trial lens holder down during the test will also turn off the Head Track-
ing and Vertex Monitoring devices. You should never put down the trial lens holder after
the test has begun unless directed to do so. An example of where this is necessary is prior
to the continuation of a Full-field test to test the peripheral portion of visual field.
CANCEL
This button will resume testing without any changes.
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