Zeiss HUMPHREY 720i, User Manual

Page: 218 / 328

11-10 KINETIC TESTING
REV. B 02/03 PN 51680-1 HUMPHREY FIELD ANALYZER II - i series
Selecting the meridian by
using the cursor
To present a stimulus manually to a patient using the Cursor, follow the steps below:
1
The Cursor may be
adjusted to various
incremental values for
assistance in selecting the
desired meridians. Select the
sensitivity of the cursor by
pressing the SNAP TO pull-down
to choose between 1, 5, 10 or
15 degree increments.
2
Move the Cursor to the
desired location. You may
move the position of the cursor
using a mouse, trackball,
glidepad or you may hold your
finger on the touch screen and
move the cursor to the desired
location. The actual location is
noted on the screen in the
“Meridian” area above the
visual field. In this example,
the Cursor is registering its
location in 5 degree
increments. You do not need to press the mouse or trackball to locate the starting position.
This method only selects the meridian, it does not locate the starting position away from
fixation (the radius). The starting position is fixed by whether the Full Field or Central size is
chosen.
3
Prepare the patient for the test. Explain that the light will not be seen for a short time and
then it will move into the patient's field of vision. Ask the patient to press the response
button as soon as the light is seen. See Section 3: “Preparing the Patient” for additional details.
4
Press ENTER on the keyboard or SELECT MERIDIAN on the screen to start the stimulus.
After a slight pause, the test stimulus will begin to move toward the fixation point in the
middle of the bowl.
Note: The Humphrey Field Analyzer II does not automatically monitor the patient’s
fixation during kinetic perimetry. Both Gaze Tracking and Blind Spot Monitoring are
turned off. For reliable test results, it is imperative that the operator constantly monitor
fixation with the video eye monitor.
Testing Sequence is Continued after the Next Page
11.htp 3/13/03, 3:01 PM 10