Blind Spot Map - Zeiss HUMPHREY 720i User Manual

KINETIC TESTING

Blind spot map

REV. B 02/03 PN 51680-1
The Special Mapping feature has a built-in program to find and map the blind spot. Most often
the I4E stimulus, which is the smallest but most intense Goldmann stimulus, can be used to
plot the blind spot. A larger target may be required if the I4E isopter is too small and fails to
enclose the blind spot.
The Humphrey Field Analyzer II will move the stimulus to a point approximately 15˚ temporal
to fixation and just below the horizontal axis for the eye being tested. Starting at this center
point, the stimulus will move out toward the periphery in each of the directions shown on the
Meridian Pattern button. It stops when the patient pushes the response button. In this way, the
HFA II will map the blind spot borders.
1
From the Special
Mapping screen, press
BLIND SPOT MAP.
2
The Kinetic Parameters
Setup screen will appear.
Use the drop-down menus to
make any changes. See "Setting
Parameters" in this section for
details.
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 details.
HUMPHREY FIELD ANALYZER II - i series
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