Zeiss CIRRUS HD-OCT 500, User Manual

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CIRRUS HD-OCT User Manual 2660021169012 Rev. A 2017-12
Anterior Segment
8-51
The High Definition Images analysis screen displays the iris viewport with the scan pattern
superimposed. The length, line spacing, and angle of the scan are displayed above the
large OCT scan. The thumbnails of the five lines are shown below the iris viewport. The
large scan image on the right corresponds to the highlighted blue thumbnail and the
highlighted blue scan line. Click another thumbnail image or a raster line in the iris
viewport to display it as the large image.
Epithelial Thickness
In Pachymetry Analysis
To access the Epithelial Thickness Maps, open Pachymetry Analysis and go to the
dropdown list [(1) in
Figure 8-29 ], and select Epithelial Thickness Maps.
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Epithelial Thickness Data Tables
As with the Pachymetry maps, the data tables displayed below the Epithelial maps contain
thickness measurements for the zones shown on the thickness maps. Minimum, average,
and maximum thickness measurements in micrometers for the four radial zones appear.
The zone range is defined in millimeters away from the center of the map. The central ring
has a diameter corresponding to 2 mm, the second ring a diameter corresponding to 5
mm, the third ring corresponding to a diameter of 7 mm, and the fourth ring 9 mm. The
zone grid is centered on the corneal vertex (the intersection of the visual axis with the
corneal surface). The “X” shows the location of the vertex. This value is also reported in the
data table.