Test Patterns & Parameters
HFA3 Instructions for Use
2660021166131 Rev. A 2018-11
A-10
Gaze Tracking
(Models 840, 850,
and 860)
The Gaze Tracking system automatically measures gaze direction at the time of stimulus
presentation.
Note: Gaze Tracking is the default for SITA Faster.
Blind Spot
The test program periodically presents a stimulus in the patient’s blind spot. If the patient
is fixating well, he or she should not see the blind spot check stimulus. The blind spot
check stimulus always matches the test stimulus size.
Off
Disables all fixation monitoring. The operator should monitor fixation with the video eye
monitor.
Fixation Target
Central
Yellow light in the center of the bowl. This is the only option available for the Threshold
Peripheral 60-4, and the Suprathreshold Esterman tests.
Small Diamond
The Small Diamond is located below the Central target, and should be used when a
patient cannot see the central fixation light (e.g.
macular degeneration). The patient
should look in the center of the diamond formed by the four lights.
Large Diamond
The Large Diamond is located below the Central target and is useful for patients with
central scotoma who cannot see either the Central fixation light or the Small Diamond.
Bottom LED
Some tests have points in the superior visual field that require a lower fixation light than
the central target. The target used is the Bottom LED of the Large Diamond. When testing
with the Superior 64 or Superior 36 Suprathreshold tests, the Bottom LED is the default
fixation target. It is illuminated automatically at the start of a test.
Test Speed
Normal
Two stimulus presentation speeds are available.
Slow
The test speed may be changed while a test is in progress to allow the patient some
additional time to respond.
Parameter
Parameter Settings
Description
Table A-5
