Zeiss Humphrey FDT 710, Руководство пользователя

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Operation
Humphrey FDT User Manual 2660021149532 Rev. B 2015-11
3-6
Preparing for a Patient Test
Remove the CALIBRATION CAP from the Patient Eyepiece. Replace the calibration cap on
the Patient Eyepiece when the instrument is not in use to minimize the accumulation of
dust and debris in the Patient Eyepiece.
Select RUN PATIENT TESTS from the FDT MAIN MENU to prepare for a SCREENING C-20
TEST, SCREENING N-30 TEST, THRESHOLD C-20 TEST or a THRESHOLD N-30 TEST.
There are two screening test programs. The N-30 Screening program adds two additional
test locations presented above and below the horizontal midline between 20 and 30
degrees eccentricity in the nasal visual field, like with the N-30 Threshold test. Also, there
are two screening level options for each screening program: the -5 (default) and -1. The
Screening C-20-5 and N-30-5 programs utilize the P=5% significance limit as the baseline
normal contrast level, whereas the Screening C-20-1 and N-30-1 programs utilize the
P=1% significance limit as the baseline normal contrast level. See the clinical example
and refer to the Primer for Frequency Doubling Technology for a further explanation of the
-5 and -1 screening level options.
To change the default screening level found in the SCREENING TEST MENU from the
C-20-5 & N-30-5 (5% level) programs to the C-20-1 & N-30-1 (1% level) programs,
follow these keystrokes:
==> UTILITIES MENU ==> SET-UP INSTRUMENT MENU
==> SET-UP OPTIONS MENU ==> SET DEFAULT SCREENING LEVEL
and use NEXT CHOICE and ACCEPT SETTINGS to select SCREENING - 1%
Note: Once RUN PATIENT TESTS is selected, typical FDT stimulus presentations are
automatically displayed to demonstrate the test to the patient until the test actually
starts.
FREQUENCY DOUBLING TECHNOLOGY MAIN MENU
RUN PATIENT TESTS
RUN DEMONSTRATION
ADVANCE PAPER
UTILITIES MENU
24 JUN 1997 04:08 PM