Zeiss Humphrey II-i series, User Manual

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Humphrey Field Analyzer II-
i
series User Manual 2660021145640 A
Test Parameters and Strategies 4-1
(4) Test Parameters and Strategies
Setting Test Parameters 4-1
Test Strategies 4-4
SITA Testing 4-10
Your HFA II- i has a number of options for using different parameters and testing strategies. This
chapter discusses standard and non-standard testing parameters as well as the procedure to modify
the parameters for specific patients.
There are a number of test strategies available for Screening
tests. For Threshold tests, the primary testing strategy is SITA.
SITA, the Swedish Interactive Thresholding Algorithm, has
replaced the Full Threshold strategy as the standard for testing.
This chapter answers these and other questions:
• Which parameters are the default parameters?
• What test parameters can I change during the test?
• Can I slow down the test for an elderly patient?
• What are the three test strategies for Screening tests?
• When can I use the SITA testing strategy?
Setting Test Parameters
Test parameters are the testing conditions used during a test (
e.g.,
stimulus size, test strategy, test
speed, etc.). While the majority of patients are best examined using “standard” parameters (or
default parameters), you can alter the parameter settings to tailor the test to meet particular patient
needs.
One example of a test parameter is the fixation target which has four settings: central, small
diamond, large diamond, and bottom LED. The central fixation light is the default target. It is
suitable for most patients, but you can change it if the patient requires a larger target.