CIRRUS HD-OCT User Manual 2660021169012 Rev. A 2017-12Appendix C-3Tables 4 and 5 show the mean difference in CCT, ATA, ACD and Pachymetry measurementsbetween the CIRRUS HD-OCT Model 5000 and Visante OCT for the Normal Cornea andCorneal Pathology groups.Table 6 shows the Pachymetry measurements of the Post-LASIK group, comparing theresults from the CIRRUS HD-OCT Model 5000 and Visante OCT.Table C-1: Repeatability and Reproducibility of CIRRUS HD-OCT 5000Normal Cornea GroupScan Type Repeatability ReproducibilityParameter Mean SD Limit CV% SD Limit CV%Anterior ChamberCCT 549.5 9.749 27.297 1.774 11.897 33.311 2.165Angle to Angle 12.030 0.171 0.479 1.423 0.300 0.840 2.494ACD 2.858 0.034 0.096 1.199 0.046 0.128 1.601PachymetryCenter 528.3 1.197 3.350 0.226 1.628 4.557 0.308Inner Nasal 552.8 2.674 7.486 0.484 3.218 9.011 0.582Inner Superior 557.9 3.399 9.518 0.609 4.261 11.930 0.764Inner Inferior 541.9 2.714 7.598 0.501 3.306 9.257 0.610Inner Temporal 532.5 1.870 5.237 0.351 2.085 5.837 0.392Outer Nasal 588.9 4.061 11.370 0.690 4.739 13.268 0.805Outer Superior 599.7 4.786 13.402 0.798 6.897 19.312 1.150Outer Inferior 572.4 3.511 9.830 0.613 5.326 14.912 0.930Outer Temporal 554.8 3.170 8.875 0.571 3.430 9.603 0.618All 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 modelRepeatability SD = Square root of the residual variance.Reproducibility SD = Square root of the sum of the operator/device variance, the interaction variance andthe 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%.
