Testing
Humphrey Field Analyzer II-
i
series User Manual 2660021145640 A
5-6
Vertex Monitor (Model 750
i
)
The Vertex Monitor will beep and display a message on the t
ouch screen if the patient backs away
more than 7 mm from his or her original position. This helps to eliminate the trial lens as a source of
visual field defects. Refer to “Accessing the Vertex Monitor (Model 750i only),” on page 2-15 for
instructions on turning on the Vertex Monitor.
The vertex reading is based on the initial patien
t position in front of the trial lens. To set:
• Make sure that the trial lens holder is in the up position in fr
ont of the eye.
• Properly align and instruct the patient.
• Initialize the Gaze Tracking feature.
The Vertex Monitor alarm will beep if the patient has backed away
from the trial lens. Testing will continue uninterrupted and a message
will re
main on the screen until cleared by the operator. Check the
position of the patient’s forehead and reposition if necessary. If the
Vertex Monitor continues to sound, press RE-INITIALIZE VERTEX. The
test will pause as the screen displays the Gaze Track initialization
sequence. This will reset the Vertex Monitor. You may also turn off the
Vertex Monitor from this screen or by pressing FIXATION from the Test
in Progress screen. The Vertex Monitor is turned off only for the length
of the current test.
Note: The Vertex Monitor works only when the trial lens
holder is in use
and Gaze Tracking has been successfully initialized.
The Vertex Monitor is necessary only when a trial lens is used.
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