Table 3.
Mean, standard deviation and range of the Corvis ST parameters in different groups evaluated in our study.
| Parameters | Mean ± SD | Range |
|---|---|---|
| Healthy, n = 64 | ||
| Time of Applanation 1 (AT1) (ms) | 7.36 ± 0.41 | From 6.9 to 9.1 |
| Length of Applanation 1 (AL1) (mm) | 1.75 ± 0.27 | From 1.3 to 2.3 |
| Velocity of Applanation 1 (AV1) (m/s) | 0.15 ± 0.04 | From 0.0 to 0.2 |
| Time of Applanation 2 (AT2) (ms) | 4.80 ± 0.59 | From 3.4 to 6.0 |
| Length of Applanation 2 (AL2) (mm) | 1.91 ± 0.46 | From 1.0 to 2.7 |
| Velocity of Applanation 2 (AV2) (m/s) | −0.34 ± 0.08 | From −0.5 to −0.1 |
| Deformation Amplitude at the highest concavity (HCDA) (mm) | 1.02 ± 0.10 | From 0.7 to 1.3 |
| PRK, n = 17 | ||
| Time of Applanation 1 (AT1) (ms) | 7.17 ± 0.27 | From 6.9 to 7.7 |
| Length of Applanation 1 (AL1) (mm) | 1.87 ± 0.37 | From 1.3 to 2.6 |
| Velocity of Applanation 1 (AV1) (m/s) | 0.17 ± 0.09 | From 0.1 to 0.5 |
| Time of Applanation 2 (AT2) (ms) | 4.94 ± 0.40 | From 4.2 to 5.6 |
| Length of Applanation 2 (AL2) (mm) | 1.70 ± 0.50 | From 1.1 to 2.7 |
| Velocity of Applanation 2 (AV2) (m/s) | −0.40 ± 0.08 | From −0.5 to −0.3 |
| Deformation Amplitude at the highest concavity (HCDA) (mm) | 1.03 ± 0.11 | From 0.8 to 1.2 |
| KC, n = 16 | ||
| Time of Applanation 1 (AT1) (ms) | 6.94 ± 0.29 | From 6.4 to 7.3 |
| Length of Applanation 1 (AL1) (mm) | 1.66 ± 0.33 | From 1.2 to 2.4 |
| Velocity of Applanation 1 (AV1) (m/s) | 0.17 ± 0.03 | From 0.1 to 0.3 |
| Time of Applanation 2 (AT2) (ms) | 5.22 ± 0.42 | From 4.6 to 5.9 |
| Length of Applanation 2 (AL2) (mm) | 1.68 ± 0.55 | From 0.9 to 2.4 |
| Velocity of Applanation 2 (AV2) (m/s) | −0.42 ± 0.11 | From −0.6 to −0.2 |
| Deformation Amplitude at the highest concavity (HCDA) (mm) | 1.12 ± 0.16 | From 0.8 to 1.5 |
| CCC, n = 13 | ||
| Time of Applanation 1 (AT1) (ms) | 6.85 ± 0.22 | From 6.5 to 7.2 |
| Length of Applanation 1 (AL1) (mm) | 1.69 ± 0.28 | From 1.3 to 2.2 |
| Velocity of Applanation 1 (AV1) (m/s) | 0.17 ± 0.04 | From 0.1 to 0.2 |
| Time of Applanation 2 (AT2) (ms) | 5.48 ± 0.71 | From 4.6 to 6.8 |
| Length of Applanation 2 (AL2) (mm) | 1.43 ± 0.48 | From 0.9 to 2.4 |
| Velocity of Applanation 2 (AV2) (m/s) | −0.45 ± 0.09 | From −0.6 to −0.3 |
| Deformation Amplitude at the highest concavity (HCDA) (mm) | 1.19 ± 0.14 | From 1.0 to 1.5 |