Zeiss CIRRUS HD-OCT 500, User Manual

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Appendix
2660021169012 Rev. A 2017-12 CIRRUS HD-OCT User Manual
C-4
Table C-2: Repeatability and Reproducibility of CIRRUS HD-OCT 5000
Corneal Pathology Group
Scan Type Repeatability Reproducibility
Parameter Mean SD Limit CV% SD Limit CV%
Wide Angle to Angle
CCT 532.1 12.061 33.772 2.267 18.951 53.061 3.561
Angle to Angle 12.363 0.175 0.491 1.418 0.247 0.693 2.002
ACD 3.060 0.040 0.113 1.321 0.061 0.171 1.991
Pachymetry
Center 521.0 2.739 7.670 0.526 2.788 7.807 0.535
Inner Nasal 553.4 3.928 11.000 0.710 4.394 12.303 0.794
Inner Superior 558.3 4.346 12.169 0.779 4.884 13.677 0.875
Inner Inferior 534.0 3.115 8.723 0.583 4.325 12.109 0.810
Inner Temporal 527.9 2.867 8.027 0.543 3.837 10.742 0.727
Outer Nasal 594.3 4.496 12.589 0.756 5.298 14.835 0.891
Outer Superior 606.5 5.534 15.495 0.912 6.185 17.319 1.020
Outer Inferior 572.5 4.233 11.851 0.739 8.945 25.046 1.563
Outer Temporal 556.2 3.821 10.699 0.687 4.792 13.418 0.862
All statistics are estimated from two-way random-effect ANOVA model with random effects opera-
tor/device, eye and interaction between operator/device and eye.
Mean = Intercept of the ANOVA model
Repeatability SD = Square root of the residual variance.
Reproducibility SD = Square root of the sum of the operator/device variance, the interaction variance and
the residual variance.
Repeatability limit = 2.8 x Repeatability SD.
Reproducibility limit = 2.8 x Reproducibility SD.
Repeatability CV% = (Repeatability SD)/Intercept x 100%.
Reproducibility CV% = (Reproducibility SD)/Intercept x 100%.