Zeiss HUMPHREY 720i, User Manual

Page: 83 / 328

TEST PARAMETERS AND STRATEGIES 4-9
REV. B 02/03 PN 51680-1 HUMPHREY FIELD ANALYZER
II -
i series
Foveal Threshold Off A threshold value for the fovea will not be
measured.
On A threshold value for the fovea will be determined at
the beginning of the test. The foveal threshold test
presents stimuli inside the Small Diamond fixation
target; the Small Diamond will automatically be illu-
minated.
Refer to Section 5: “Foveal Threshold” for details on
performing this supplemental test.
Stimulus Size I, II, III, Same as Screening Parameters. Model 720i has only
IV, V the Size III stimulus available for testing.
Stimulus Color White Same as Screening Parameters
Red Same as Screening Parameters
Blue Same as Screening Parameters
Fluctuation On Threshold values for ten (10) pre-selected points
are retested to determine the variability of the
patient’s responses.
Threshold values for the retested points are printed
on the numeric printout and appear in parentheses
directly below the first test result.
Fluctuation values which differ significantly from
normal are flagged with appropriate “p” (probabil-
ity) values.
Off Threshold values for pre-selected points will not be
determined twice. Some points may be retested even
if fluctuation is off. Off is the default setting when
Blue-Yellow is turned on.
Note: Short-term Fluctuation (SF) and Corrected
Pattern Standard Deviation (CPSD) values will
not be available if fluctuation is turned off.
Neither SF or CPSD are displayed with SITA Stan-
dard or SITA Fast tests.
Threshold Parameter Description
Parameters Settings
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