Table 3.
Showing the corneal biomechanical parameters in both groups preoperatively and postoperatively
| GROUP I | GROUP II | |||
|---|---|---|---|---|
| Preop. | Postop. | Preop. | Postop. | |
| CH | ||||
| Range Mean ± SD |
7.9–15.1 12.03 ± 1.76 |
6.9–13.7 9.99 ± 1.76 |
7.3–11.66 11.59 ± 1.86 |
4.8–11.1 8.46 ± 1.76 |
| P value | 0.001* | 0.002* | ||
| CRF | ||||
| Range Mean ± SD |
7.5–15 11.42 ± 1.68 |
6.5–12 9.43 ± 1.55 |
6.8–14.2 11.00 ± 1.89 |
3.69–12.4 7.45 ± 2.39 |
| P value | 0.003* | 0.001* | ||
| ORA IOPcc | ||||
| Range Mean ± SD |
9.6–21 14.89 ± 3.15 |
10.2–19.89 14.47 ± 2.88 |
9.6–19.5 15.59 ± 3.23 |
8.9–18.9 14.54 ± 2.96 |
| P value | 0.3139 | 0.1172 | ||
| CST IOP | ||||
| Range Mean ± SD |
9–21 14.89 ± 2.84 |
8.9–20 13.20 ± 2.86 |
8.6–20 15.07 ± 3.02 |
7.9–18.3 13.54 ± 2.96 |
| P value | 0.20 | 0.382 | ||
| A1 time | ||||
| Range Mean ± SD |
8–9.1 8.40 ± 0.36 |
7.4–9.1 8.23 ± 0.37 |
7.4–9.2 8.40 ± 0.39 |
6.9–8.9 7.89 ± 0.44 |
| P value | 0.069 | 0.001* | ||
| A2 time | ||||
| Range Mean ± SD |
21.2–25.9 23.64 ± 1.03 |
20.2–24.2 22.03 ± 1.11 |
21.3–25.7 23.42 ± 1.20 |
16.8–23 20.28 ± 1.87 |
| P value | 0.001* | 0.001* | ||
| A1 length | ||||
| Range Mean ± SD |
1.5–2.5 2.10 ± 0.22 |
1.56–2.23 1.90 ± 0.20 |
1.61–2.49 2.10 ± 0.23 |
1.46–2.36 1.93 ± 0.23 |
| P value | 0.0006* | 0.0063* | ||
| A2 length | ||||
| Range Mean ± SD |
1.42–2.3 1.90 ± 0.20 |
1.39–2.1 1.75 ± 0.20 |
1.49–2.28 1.90 ± 0.24 |
1.4–2.1 1.81 ± 0.21 |
| P value | 0.0061* | 0.0622 | ||
| HC time | ||||
| Range Mean ± SD |
16.5–20.1 18.39 ± 0.92 |
14.9–18.9 16.32 ± 1.10 |
16.4–19.2 17.74 ± 0.71 |
12.5–17.4 14.40 ± 1.27 |
| P value | 0.001* | 0.001* | ||
| HC radius | ||||
| Range Mean ± SD |
6.89–12.99 7.99 ± 1.35 |
5.2–10.73 6.91 ± 1.25 |
6.89–11.03 7.69 ± 1.14 |
5.7–10.23 7.00 ± 1.06 |
| P value | 0.0025* | 0.0152* | ||
| HC Peak Distance | ||||
| Range Mean ± SD |
3.1–5.3 4.09 ± 0.69 |
5.56–5.97 4.72 ± 0.71 |
2.99–4.9 3.81 ± 0.49 |
3.56–6.2 4.90 ± 0.67 |
| P value | 0.0013* | 0.001* | ||
| Deformation Amplitude | ||||
| Range Mean ± SD |
0.9–1.23 1.05 ± 0.08 |
0.94–1.28 1.10 ± 0.08 |
0.92–1.23 1.02 ± 0.10 |
1.17–1.45 1.26 ± 0.07 |
| P value | 0.013* | 0.001* | ||
*: statistically significant
CH corneal hysteresis, CRF corneal resistance factor, ORA ocular response analyzer, CST Corvis ST, IOP intraocular pressure