REV. B 02/03 PN 51680-1
HUMPHREY FIELD ANALYZER
II -
i
series
TESTING
5-7
SUPPLEMENTAL
TESTING
Foveal Threshold and Gaze Track Initialization are performed before a test begins. They are
called “supplemental tests”.
Foveal Threshold
The Foveal Threshold test measures the sensitivity of the central part of the macula, the fovea.
Foveal threshold testing is the only available with threshold visual field tests. Whenever the
Foveal Threshold parameter is turned ON, the Foveal Threshold test is the first supplemental
test procedure. Press CHANGE PARAMETERS to turn Foveal Threshold ON.
1
After pressing START, the Foveal Threshold test will be initiated.
2
The small diamond fixation
target will light up below
the central fixation target.
Instruct the patient to look at
the center of the lower
fixation lights (in the center
of the diamond).
3
Tell the patient to press the response button whenever a light is seen inside of
the fixation diamond.
4
Press START to begin the Foveal Threshold test.
5
When completed, a second
pop-up window will appear.
The yellow light will return to
the Central fixation target.
Direct the patient to look at the
central fixation light. Press
START to begin Gaze Tracking
initialization (or begin the test if
Gaze Tracking is inactive).
Note: The Foveal Threshold value will be displayed in the center of the visual field on the
test screen. It is recorded below the reliability indices on the printout.
Test Bowl
Central
Fixation
Target
Fixation Diamonds
5.htp
3/14/03, 3:15 PM
7
Содержание HUMPHREY 720i
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