HFA3 Instructions for Use 2660021166131 Rev. A 2018-11
Go to Contents Test Patterns & Parameters
A-9
Suprathreshold Test Settings
The following table displays parameter settings availab
le only when Suprathreshold Testing is
chosen. Default values are shown in bold.
Shared Settings
The following table displays parameter settings available for both Static Thr
eshold and
Suprathreshold testing. Default values are shown in bold.
Parameter Parameter Settings Description
Test Strategy Two Zone For each point in the test pattern, a stimulus i
s presented 6 dB brighter than the expected
threshold. Since testing is done with an intensity 6 dB brighter than the expected threshold,
Points Not Seen are known to be at least 6 dB deep. Use with all Suprathreshold test
patterns. Esterman tests use only the Two Zone test strategy.
Three Zone Same as Two Zone, except each missed point is measured again at a maximum intensity of
1
0,000 apostilbs (0 dB) to determine if the defect is absolute. Use with all Suprathreshold test
patterns except the Esterman tests.
Quantify Defects Same as Two Zone, except the sensitivity at each missed
point is measured relative to the
expected threshold. Use with all Suprathreshold test patterns except the Esterman tests.
Test Mode Age Corrected Vision is most acute at the fovea and decreases towar
d the periphery of the retina resulting in
a hill of vision with the peak occurring at the fovea. A hill of vision is assigned to the patient
based on the patient’s age. Age Corrected mode is used only with Size III, White stimuli, and
can be used with all Suprathreshold test patterns except the Esterman tests.
Threshold Related A hill of vision is assigned only after threshold values
for 4 primary points are determined. Use
with all Suprathreshold test patterns except the Esterman tests.
Single Intensity Available only with the Two Zone test
strategy. Esterman tests use only the Single Intensity
test mode. The HFA uses a default intensity level of 10 dB to test the entire visual field. The
default can be changed except with the Esterman tests.
Table A-4
Parameter Parameter Settings Description
Blue-Yellow/Short-Wave
length Au
tomated
Perimetry or SWAP
(Models 850 and 860)
Off/On Blue-Yellow testing uses a blue stimulus pr
esented on a yellow background.
Stimulus Color White (all models) White stimulus projected onto white bowl background. White is used only for the
SIT
A-Standard, SITA-Fast, and Suprathreshold Age Corrected test strategies, as well as the
Esterman test patterns.
Red (Models 840,
8
50, and 860)
Red stimulus projected onto white bowl background.
Blue (Models 850 and
8
60)
Blue stimulus projected onto white bowl background. Background is yellow, if Blue-Yellow
is
On.
Stimulus Size I, II, III, IV
, V Five stimulus sizes (diameters) are available, ranging from Size I (smallest) to Size V
(largest). SITA-Standard, SITA-Fast, and Suprathreshold Age Corrected test strategies, as
well as the Esterman test patterns use only Size III. SITA-SWAP uses only Size V.
Fixation Monitoring Gaze/Blind Spot The Blind Spot and Gaze Tracking system are both activated.
Table A-5
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