Zeiss HUMPHREY 720i, User Manual

Page: 87 / 328

TEST PARAMETERS AND STRATEGIES 4-13
REV. B 02/03 PN 51680-1 HUMPHREY FIELD ANALYZER
II -
i series
Room illumination should be off or at a very low level in order to preclude significant amounts
of stray light from falling on the bowl and affecting Blue-Yellow test conditions.
1
From the Start of Test screen select CHANGE PARAMETERS. Switch Blue-Yellow from Off to
On and press SELECTION COMPLETE.
2
Move the visor handle
located under the
forehead rest towards the
bowl (away from the
patient). See Figure 4.3. This
helps to shield the patient’s
eye from the glare produced
by the yellow bowl light.
Press OK on the reminder
message after you have
extended the visor.
Figure 4.3: Extending the Visor Away From the Patient
3
Follow the standard testing procedures normally 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 about 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.
Note: The Size V Blind Spot check may cause artificially high fixation losses on certain
patients. You may wish to turn off the blind spot monitor and utilize only Gaze Tracking
to monitor fixation when testing these patients.
Push visor
away from the
patient
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