Zeiss CIRRUS HD-OCT 500, User Manual

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CIRRUS HD-OCT User Manual 2660021169012 Rev. A 2017-12
Posterior Segment Scans
6-3
Macula
The scans used for viewing the macula are: Macular Cube 200x200 and Macular Cube
512x128.
Macular Cube 200x200
This scan generates a cube of data through a 6 mm square grid by acquiring a series of
200 horizontal scan lines each composed of 200 A-scans and a central horizontal
HD B-scan.
Macular Cube 512x128
This scan generates a cube of data through a 6 mm square grid by acquiring a series of
128 horizontal scan lines each composed of 512 A-scans and a central horizontal HD
B-scan. The Macular Cube 512x128 is the default scan. Compared to the 200x200, this
scan has greater resolution in each line from left to right, but the lines are spaced further
apart, giving less resolution from top to bottom. This scan can be used to measure macular
thickness (corneal thickness for anterior segment scans), and create a 3–D image of
the data.
Optic Nerve
The scan used for viewing the optic nerve is the Optic Disc Cube 200x200 scan.
Optic Disc Cube 200x200
The Optic Disc Cube 200x200 generates a cube of data through a 6 mm square grid by
acquiring a series of 200 horizontal scan lines each composed of 200 A-scans The fixation
target is offset to one side to allow the center of the optic nerve to move to the center of
Macular Cube 200x200
Macular Cube 512x128