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
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retinal tracking system tracks eye movement and enables tracking of the current scan
to the position of a prior scan. The FastTrac retinal tracking system on CIRRUS HD-OCT
uses multiple channels of concurrent imaging to monitor the motion of the eye in
real–time. During acquisition, motion is automatically detected and tracked to the
eye. The motion of the retina is observed at a high rate to ensure higher efficiency in
reducing the effects of motion. Most importantly, FastTrac ensures faster data
acquisition by only re-scanning data affected by motion. FastTrac also allows precise
scanning at follow-up visits to acquire data at the same region of the eye allowing for
better progression analysis.
In addition to the selectable options that appear on the Acquisition screen, you can adjust
certain system parameters using the left mouse button and scroll wheel, and open
additional options by clicking the right mouse button. Mouse controls and options are
discussed below.
Mouse Controls
Using your mouse provides a rapid way of accessing most of the controls that are available
as buttons or in menus on the CIRRUS screens. During scan acquisition you can adjust scan
pattern placement using your mouse for posterior scans by hovering over the fundus image
(the mouse cursor will turn into a
), and dragging the scan pattern box area to another
position.
Hover the mouse over the fixation target icon (the mouse icon will turn into ), and
then click and drag the fixation target to change the center its location to one of 9 pre-set
locations.
Right-clicking the mouse will bring up an option box that allows you to select to Rapid
Refresh View (model 500 only). This is a great tool for patients with unsteady fixation as it
increases the rate at which the screen refreshes, reducing the affect of unsteady fixation.
Double-clicking anywhere on the fundus image will change the fixation location to bring
that point (clicked) into the center of view.
Live Scan Viewports
The right half of the main Acquire Scan Viewport comprises the live data feed based on
your current iris and fundus settings. The number of viewports may vary depending on the
scan type selected. Each scan view includes a color–coded scan marker at upper left, to
identify scan lines. The color and orientation of each marker correspond to the color and
orientation of the lines that make up the scan pattern overlay derived from the Fundus
Viewport (for posterior segment scans) or the Iris Viewport (for anterior segment scans).
Live scans can be adjusted in real time using
• Center Live Scan allows you to adjust the zoom (Z-offset) of posterior segment
live scans. Associated up and down arrow buttons enable you to adjust the value
manually.