Humphrey Field Analyzer II-
i
series User Manual 2660021145640 A
Short-Wavelength Automated Perimetry (SWAP)
9-5
7 Locate the visor handle that is located just below the forehead rest (see Figure 9.3). Slide the
handle toward the back of the bowl (away from the patient).
SLIDE VISOR HANDLE
AWAY FROM YOU
Figure 9.3 Extending the Blue-Yellow Visor Prior to Testing
Note: The visor helps shield the patient’s eyes from the glare produced by the yellow
bowl-illumination lamp.
8 Follow the standard testing procedures that normally are used for white-on-white perimetry for
setting up and explaining the test. The patient’s test eye should adapt to the yellow bowl
illumination for approximately three (3) minutes before beginning the test. Having the patient
look into the bowl, while you enter patient data and explain the test, will help to save time.
Repeat the 3 minute adaptation period for the second eye. You must allow this adaptation
period prior to beginning every SWAP test.
Note: It is important to remind the patient to blink often during the test, prefer
ably when she/he
presses the patient response button. Staring at the bowl for long periods of time can cause the
peripheral visual field to fade (the “Troxler Effect”) altering the results.
Note: The Size V Blind Spot check may cause artificially high blind spot fixation check errors on
certain patients. You may wish to turn off the blind spot monitor and utilize only Gaze Tracking to
monitor fixation.
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