Zeiss CIRRUS HD-OCT 500, User Manual

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CIRRUS HD-OCT User Manual 2660021169012 Rev. A 2017-12
Posterior Segment
8-17
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If the fovea is not found, the fovea location and measurement circles are centered in the 6
mm square and the calculations are made based on this position.
The background Fundus image is not on the main analysis screen. To see the Fundus
image, double–click a thickness map or OCT Fundus image to see the full page view, which
will have the Fundus image in the background.
Advanced RPE Analysis
Advanced RPE Analysis allows for examination of the status of the RPE in more detail than
the Macular Thickness Analysis, allowing analysis of disturbances in the RPE.
Identification and measurement of elevations in the RPE and areas of sub–RPE illumination
may be helpful in managing age–related macular degeneration, including advanced forms
where atrophy of the RPE is present.
Two separate screens are available:
• screen 1: RPE elevation and the sub–RPE illumination results shown separately as
en
face
images ( Figure 8-12 ).
• screen 2: Images that combines the RPE Elevation Map and the sub–RPE illumination
segmentation along with calculated values.
By default, the selected current scan is compared to the best scan of the same type from
the patient’s most recent prior visit. You can always change this scan using Manual
Selection (see "
Manual Selection" on page 8-12 ). If there is only data from one visit,
the prior area will remain blank.