Zeiss CIRRUS HD-OCT 500, User Manual

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CIRRUS HD-OCT User Manual 2660021169012 Rev. A 2017-12
Anterior Segment Scans
6-9
horizontally. The scan is adjustable from –89 to 90 degrees, though rotation may reduce
the field The 5.8 mm scan depth is achieved by allowing the source and mirror images to
overlap. Note that in the overlap region (indicated by blue overlay), source image detail
may be compromised. This scan requires the Anterior Chamber external lens. The Anterior
Chamber Scan provides the data used for Anterior Chamber measurements (
"Anterior
Segment Scans" on page 6-6 ).
The Acquire screen displays the position of the Anterior Chamber scan pattern on the live
iris image. The OCT B-scan image on the right displays the cornea and mirror image of the
scan. The Anterior Chamber scan requires the Anterior Chamber external lens.
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Guidelines for Anterior Chamber Scan Acquisition
• Attach the external Anterior Chamber lens to the instrument lens mount, see
"Attaching an External Lens" on page 6-8 .
• Instruct the patient to fixate on the center of the fixation target even though it may
not appear to be in focus.
1 Mirror iris image
2 Cornea image 3 Mirror cornea image
4 Iris image 5 Lens of the eye
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