Table 2.
Anterior segment parameters and their comparisons between groups.
| Parameters mean ± SD | Normal N = 25 | Suspect N = 41 | Mild KC N = 40 | Moderate KC N = 71 | Severe KC N = 48 |
|---|---|---|---|---|---|
| Thinnest location (μm) | 525.7 ± 38.7 | 486.4 ± 41.2 | 475.1 ± 40.4 | 443.5 ± 49.2 | 384.2 ± 57.1 |
| CTA (μm) | 578.1 ± 62.0 | 529.4 ± 56.2 | 507.1 ± 61.5 | 473.9 ± 53.6 | 421.1 ± 68.9 |
| ACD (mm) | 3.1 ± 0.2 | 3.2 ± 0.3 | 3.2 ± 0.3 | 3.3 ± 0.2 | 3.6 ± 0.3 |
| CV (mm3) | 56.6 ± 3.9 | 52.3 ± 4.0 | 53.6 ± 4.0 | 53.9 ± 4.1 | 55.2 ± 4.7 |
| Anterior mean K | 42.2 ± 1.1 | 42.5 ± 1.3 | 45.0 ± 1.19 | 47.2 ± 1.9 | 55.5 ± 6.1 |
| Posterior mean K | −5.9 ± 0.3 | 0.45 ± 5.9 | 1.1 ± 6.2 | 0.7 ± 6.8 | 0.1 ± 8.6 |
| Anterior elevation | 4 ± 2.2 | 9 ± 9.1 | 12 ± 9.9 | 17 ± 12.2 | 32 ± 20 |
| Posterior elevation | 9.7 ± 3.6 | 17.8 ± 11.7 | 18.9 ± 9.3 | 28.2 ± 17.6 | 54.7 ± 28.9 |
CTA: Corneal Thickness at the Apex, ACD: Anterior Chamber Depth, K: Keratometry, KC: Keratoconus, CV: Corneal volume.