Table 2.
Summary of the intrasession repeatability outcomes for the anatomical measurements evaluated with the VX120 system
| Overall mean (SD) Overall median (Range) | Sw | Pr | CV (%) | ICC (Range 95% CI) | |
|---|---|---|---|---|---|
| ACD (mm) | 2.86 (0.29) 2.83 (2.10 to 3.77) |
0.03 | 0.06 | 1.16 | 0.992 (0.989 to 0.994) |
| PCTN3 (μm) | 592.04 (39.87) 601.00 (533.67 to 699.00) |
8.98 | 17.59 | 1.52 | 0.976 (0.957 to 0.987) |
| PCTN2 (μm) | 567.77 (37.83) 575.67 (506.33 to 675.33) |
7.05 | 13.81 | 1.25 | 0.984 (0.971 to 0.991) |
| PCTN1 (μm) | 574.89 (45.35) 549.67 (508.33 to 699.00) |
7.70 | 15.09 | 1.34 | 0.984 (0.972 to 0.992) |
| CCT (μm) | 545.88 (34.70) 544.67 (428.00 to 657.67) |
6.41 | 12.56 | 1.17 | 0.983 (0.977 to 0.988) |
| PCTT1 (μm) | 553.27 (37.44) 545.67 (492.00 to 664.33) |
5.91 | 11.59 | 1.08 | 0.987 (0.977 to 0.993) |
| PCTT2 (μm) | 568.70 (37.58) 573.33 (510.67 to 681.33) |
6.06 | 11.87 | 1.07 | 0.987 (0.977 to 0.993) |
| PCTT3 (μm) | 593.76 (38.58) 598.67 (529.00 to 708.00) |
8.33 | 16.33 | 1.41 | 0.979 (0.963 to 0.989) |
| IAN (°) | 37.17 (4.35) 37.00 (28.33 to 46.00) |
0.84 | 1.65 | 2.23 | 0.970 (0.946 to 0.984) |
| IAT (°) | 39.63 (4.59) 39.67 (30.67 to 50.33) |
0.52 | 1.02 | 1.32 | 0.994 (0.988 to 0.997) |
| WTW (mm) | 12.21 (0.57) 12.17 (10.99 to 13.94) |
0.24 | 0.46 | 1.95 | 0.873 (0.823 to 0.911) |
Abbreviations: SD standard deviation, CV coefficient of variation, S w within-subject standard deviation, Pr intrasubject precision: 1.96 x Sw, ICC intraclass correlation coefficient, ACD anterior chamber depth, PCT N1 , PCT N2 , and PCT N3 peripheral corneal thickness at 1, 2 and 3 mm from vertex nasally, PCT T1 , PCT T2 , and PCT T3 peripheral corneal thickness at 1, 2 and 3 mm from vertex temporally, CCT central corneal thickness, IA N and IA T nasal and temporal irido-corneal angles and WTW horizontal white-to-white corneal diameter