Zeiss CIRRUS HD-OCT 500, Руководство пользователя

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CIRRUS HD-OCT User Manual 2660021169012 Rev. A 2017-12
Anterior Segment Scans
6-13
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Guidelines for HD Angle Scan Acquisition
• For an HD Angle scan, you may need to use the external fixation device if the patient
has difficulty fixating without the internal fixation target, which is not in view when
the limbus of the scan eye is optimally exposed. The external fixation device may help
the patient fixate with the eye that is not being scanned, for correct angle alignment.
• Adjust the area of the eye visible in the Iris viewport until the iris is in clear focus, and
make coarse adjustments with the X-Y controls to move the chinrest until the
corneoscleral junction is in view.
• Use the mouse scroll wheel to bring the angle into view on the B-scan, centering it in
the lower quadrant of the B-scan viewport and maximizing exposure of the cornea.
• If the angle recess in the B-scan appears shadowed by the sclera, move the scan
slightly along the limbus to minimize the effect, or ask the patient to adjust fixation
further away from center.
• Align the scan at the desired location on the limbus, and then align the B-scan so that
the anterior chamber angle falls in the lower left and lower right quadrant,
respectively.
Figure 6-7 shows a well–aligned scan and live OCT image of
an HD Angle scan.