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Adjustment / Calibration
Humphrey Field Analyzer II - i
Confidential and Proprietary
Field Service Guide
4 - 34
52235C1105
Prerequisites
1)
Remove the front and rear covers (Section 3.2, 3.3); then reinstall the front cover.
2)
Verify trial lens alignment (Section 4.9.6).
3)
Verify camera position/size (Section 4.8.6.1).
Procedure
1)
Install the fake eye on the tool stand and slide the tool stand onto the instrument
chinrest. Push the tool stand forward slightly on the chinrest so that the metal tips on
the Tool Stand Alignment Adaptor make contact with the headrest (Figure 4-2). This is
the position the tool stand should be in when performing the procedure.
2)
From the Calibration main menu, select
CAMERA
, then
POSITION
, then
GAZE
MONITOR.
3)
Using the chinrest control switch, center the fake eye on the center cross in the video
insert.
4)
Using the pads on the menu, adjust the size and then the position of the gaze tracking
box until it matches the upper left box scribe marks on the tool. Alternate between size
and position until the adjustment is correct. Adjust the size of the Gaze Tracking box
until it matches the remaining box scribe marks.
5)
Select
STORE
, then
DONE
.
6)
Check for the following values:
WIDTH = 23
HEIGHT = 15
RATIO = 0.660
If any of the values displayed are different, repeat the above calibration procedure to
accurately size and position the gaze tracking box. When finished select
STORE
, then
DONE
.
4.8.6.3
Camera Intensity (for all
HFA II - i
models)
Purpose
This procedure ensures that the patient eye appears clearly illuminated in the camera video
insert, and the trial lens IR LEDs are emitting proper output.
For models
720
i
,
this procedure sets the reflex gaze LED, providing additional illumination to
help differentiate the iris from pupil.
For models
740
i
and
750
i
, this procedure sets the brightness of the reflex gaze LED to
properly monitor gaze tracking, and sets the brightness and balance of the trial lens LEDs.
Summary of Contents for humphrey HFA II-i series
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Page 424: ...Page 4 FA2i 013A PROPRIETARY and CONFIDENTIAL...
Page 502: ...FA2i 041 Page 3 Figure 2 Press rectangle in Top Left corner...
Page 516: ...Page 2 FA2i 046 Figure 1 Glass Film Wedge Detectors P N 67417 Note Spacing Washer Placement...
Page 517: ...FA2i 046 Page 3 Figure 2 Y Motor Turret Detector P N 67418 Note Spacing Washer Placement...