Table 2.
Description of the combined Pentacam-Corvis subgroups in mean±standard deviation (range)
| Group | A1 length (mm) | A2 length (mm) | PD (mm) | A1 velocity (m/s) | A2 velocity (m/s) | CRHC (mm) | DA maximum (mm) |
|---|---|---|---|---|---|---|---|
| Normal (n=320) | 2.24±0.34 (1.44–3.08) | 2.04±0.37 (0.72–3.20) | 4.88±0.28 (3.86–5.49) | 0.14±0.02 (0.09–0.19) | 0.24±0.03 (0.14–0.34) | 6.92±0.85 (5.04–10.35) | 1.00±0.09 (0.72–1.25) |
| Subclinical KC (n=48) | 2.24±0.40 (1.38–3.05) | 1.94±0.45 (1.06–3.17) | 4.87±0.31 (4.28–5.57) | 0.14±0.02 (0.10–0.19) | 0.25±0.03 (0.21–0.34) | 6.33±0.84 (4.95–8.42) | 1.03±0.11 (0.87–1.31) |
| KC (n=243) | 2.00±0.34 (1.38–3.10) | 1.71±0.35 (0.69–2.95) | 4.92±0.26 (3.51–5.61) | 0.16±0.02 (0.10–0.25) | 0.26±0.04 (0.09–0.42) | 5.56±0.90 (2.93–10.22) | 1.10±0.13 (0.64–1.70) |
|
| |||||||
| Group | IOP (mmHg) | bIOP (mmHg) | CCT (µm) | DA ration maximum (mm) | INR | ARTh | SP-A1 (mmHg/mm) |
|
| |||||||
| Normal (n=320) | 15.88±2.50 (11.00–24.50) | 15.45±2.06 (11.10–22.80) | 552.58±28.88 (484–644) | 4.32±0.40 (3.30–5.60) | 8.85±1.03 (6.10–11.30) | 528.40±91.70 (325.70–813.50) | 109.85±17.51 (57.10–182.40) |
| Subclinical KC (n=48) | 15.13±2.37 (10.00–19.50) | 14.83±1.98 (10.70–18.60) | 547.90±32.38 (463–610) | 4.60±0.47 (3.80–5.70) | 9.67±1.20 (7.60–12.4) | 477.95±90.28 (314.30–753.80) | 102.25±18.71 (59.40–134.60) |
| KC (n=243) | 13.29±2.78 (5.00–34.00) | 14.47±2.60 (7.40–35.90) | 492.99±34.32 (392–582) | 5.34±0.92 (3.40–11.50) | 11.95±2.32 (4.60–23.70) | 277.39±103.39 (62.70–621.00) | 73.53±18.85 (15.30–123.70) |
Classification was based on consensus of experts. A1 length: First applanation length, A2 length: Second applanation length, PD: Peak distance, A1 velocity: First applanation velocity, A2 velocity: Second applanation velocity, CRHC: Curvature radius highest concavity, DA max: Max deformation amplitude, IOP: Intraocular pressure, bIOP: Biomechanical corrected intraocular pressure, CCT: Central corneal thickness, DA ratio max: Deformation amplitude, INR: Integrated radius, ARTh: Ambrosio’s relational thickness to the horizontal profile, SP-A1: Stiffness parameter at A1, n: Number of images, KC: Keratoconus