Zeiss CIRRUS HD-OCT 500, User Manual, Page: 87 / 352

CIRRUS HD-OCT User Manual 2660021169012 Rev. A 2017-12
Anterior Segment Scans
6-15
• Click the center of the pupil and use the X-Y and Z controls to center the scan on the
corneal vertex, positioning the anterior corneal surface to the upper red line in the
B-scan viewport as shown in
Figure 6-8 .
NOTE: A strong vertical central reflection line on the B-scan indicates the scan is centered
on the corneal vertex.
Wide Angle-to-Angle Scan
This scan (for anterior segments only) generates a wide field, speckle–reduced raster scan
with a depth of 2.9 mm. It uses 20 B-scans, each composed of 1024 A scans and is
15.5mm in length when oriented horizontally. The scan is adjustable from –89 to 90
degrees, though rotation may reduce the field The scan simultaneously highlights both 0
and 180 degree iridocorneal angles. This scan requires the Anterior Chamber external lens.
The Wide Angle-to-Angle Scan is used as the basis for the Wide Angle-to-Angle Analysis
(
"Using Wide Angle-to-Angle Analysis" on page 8-43 ).
The Acquire screen displays the position of the Wide Angle-to-Angle scan pattern on the
live iris image and the OCT image of the scan on the right.
cáÖìêÉ=SJV==^ÅèìáêÉ=ëÅêÉÉåI=táÇÉ=^åÖäÉJíçJ^åÖäÉ