Anterior Segment
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CIRRUS HD-OCT User Manual
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Click the Add Left IC Angle button
or Right IC Angle button
to place the left or
right iridocorneal angle tool on the image.
The iridocorneal angle tool is a trapezoid that can be moved and adjusted to graphically
display angle opening distance (AOD) at 500mm and 750mm, trabecular iris space area at
500mm and 750mm, and sclera spur (SSA) angle. A table based on the dimensions of the
trapezoid is displayed with values for the AOD 500 and 750, TISA 500 and 750, and SSA
parameters.
Move the pointer to any line on the trapezoid, and then drag the tool to an area of interest.
Move the pointer to the end of any line on the trapezoid until it changes to a yellow circle,
and then drag the end.
Example:
1. Identify the scleral spur and place point A of the IC Angle Tool at the scleral spur.
2. Adjust point C (AOD 500 corneal endpoint) to touch the corneal endothelium.
3. Adjust point E (AOD 750 corneal endpoint) to touch the corneal endothelium.
4. Adjust point F (AOD 750 Iris Endpoint) to touch the iris.
5. Adjust point D (AOD 500 Iris Endpoint) to touch the iris.
6. Adjust point B (Scleral Spur Iris Endpoint) to touch the iris.
In Anterior Chamber Analysis
1. Select
Add Left Angle Tool or
Add Right Angle Tool above the main
viewport of the Anterior Chamber Analysis screen.
2. Place point A of the Angle Tool at the scleral spur.
3. Adjust point B to touch the corneal endothelium.
4. Adjust point C to touch the iris. See
.
Abbreviation
Measurement
AOD500
Angle Opening Distance at 500 mm: Distance between C and D.
AOD750
Angle Opening Distance of 750mm: Distance between E and F.
TISA500
Trabecular Iris Space Area 500 (mm
2
): The area of the polygon defined by the sides
forming a circuit through points A,C,D, and B.
TISA750
Trabecular Iris Space Area 750 (mm
2
): The sum of the areas of the two quadrangles
defined by the sides A, C, D, B, and C, E, F, D.
SSA
Scleral Spur Angle: This is a measure of the angle formed by CAD, that is, the angle
measured at the conjunction of lines CA and AD. Note that line AD, which is not
, is the line connecting the Scleral Spur (point A) to the AOD
500 iris endpoint (point D).
Summary of Contents for CIRRUS HD-OCT 500
Page 1: ...2660021156446 B2660021156446 B CIRRUS HD OCT User Manual Models 500 5000 ...
Page 32: ...User Documentation 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual 2 6 ...
Page 44: ...Software 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual 3 12 ...
Page 58: ...User Login Logout 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual 4 14 ...
Page 72: ...Patient Preparation 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual 5 14 ...
Page 110: ...Tracking and Repeat Scans 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual 6 38 ...
Page 122: ...Criteria for Image Acceptance 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual 7 12 ...
Page 222: ...Overview 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual 9 28 ...
Page 256: ...Log Files 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual 11 18 ...
Page 308: ...Appendix 2660021169012 Rev A 2017 12 CIRRUS HD OCT User Manual A 34 ...
Page 350: ...CIRRUS HD OCT User Manual 2660021169012 Rev A 2017 12 I 8 ...
Page 351: ...CIRRUS HD OCT User Manual 2660021169012 Rev A 2017 12 ...