| G I | G II | G III | G IV | p-value |
Sex M/F | 20/10 | 18/12 | 17/13 | 17/13 | 0.841 |
Age | 48.60 ± 5.96 | 48.40 ± 6.30 | 48.83 ± 5.83 | 50.43 ± 6.36 | 0.559 |
IOP before block | 21.28 ± 2.10 | 21.49 ± 1.89 | 21.25 ± 1.81 | 21.09 ± 2.0 | 0.888 |
IOP after block | 21.14 ± 2.14 | 18.65 ± 1.57 | 20.06± 1.53 | 21.22 ± 1.66 | 0.001* |
Onset of anesthesia | 3.77 ± 0.90 | 2.57 ± 0.50 | 1.77± 0.63 | 3.60 ± 0.89 | 0.001* |