Zeiss HUMPHREY 720i, User Manual

Page: 39 / 328

GENERAL OPERATION
REV. B 02/03 PN 51680-1 HUMPHREY FIELD ANALYZER
II -
i
series
2-13
Accessing head tracking
1
Start at the System Setup screen. Select the Head Tracking drop-down menu.
(model 750i)
2
Choose between ON and
OFF.
Note: If Head Tracking is turned on during testing and the patient moves, the instrument
will adjust the chin rest in small, 0.3 mm increments until the patient returns to the
original position. This feature only works if Gaze Tracking has been successfully initial-
ized and the trial lens holder is in the Up position. For additional information, see
Section 5: “ Head Tracking”.
Accessing the vertex
1
Start at the System Setup screen. Select the Vertex Monitor drop-down menu.
monitor (model 750i)
2
Choose between ON and
OFF.
Note: When the Vertex Monitor is turned on, a beep will sound if the patient has backed
away from the trial lens during testing. Although the test will not pause, a message will
remain on the screen until cleared by the operator. This feature only works if Gaze
Tracking has been successfully initialized and the trial lens holder is in the Up position.
For additional information, see Section 5: “Vertex Monitor”.
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