Zeiss CIRRUS HD-OCT 500, User Manual

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CIRRUS HD-OCT User Manual 2660021169012 Rev. A 2017-12
Acquire Screen and Controls
6-25
centered vertically–”Z” monitored–and stops the tracking progress when some or all
of the tissue is outside the B-scan window. In some patients, it may be difficult to
align the tissue within the B-scan entirely, such as those with high myopia or other
kinds of atypical anatomies; for example, tilted retinas or posterior staphylomas. For
these patients, the user may turn off Z monitoring, as shown in the OCT Tomogram
figure on the previous page. To turn this option off, click the wand button
next to
the B-scan in the lower right of the Acquire Scan screen. If tracking is
not
enabled, the
dialog box includes the Show Alignment checkbox. For any Macular Cube Scan, this
checkbox toggles display of an alignment tool that is locked in position relative to the
scan pattern; the alignment tool moves when you move the scan pattern and vice
versa. This tool is designed to be placed over the optic disc to assist in accurately
repeating scan pattern placement for future scans of the same eye. For macular scans,
placing the alignment tool over the optic disc results in the scan center being within 1
mm of the fovea for most patients. This tool is helpful when the fovea is difficult to
find in extreme edema, cataract, or floater situations.
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For optic disc scans, the alignment tool is centered on the scan pattern and on by default.
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Click and drag scan pattern and/or fixation target to adjust their placement.
Double–click the point you wish to center. The fixation target moves accordingly.
Auto Focus
and
Z focus controls
Overlay Transparency
control for prior scans
Focus bar