Table 2.
Efficacy—IOP summary, long term
| No | IOP (mm Hg) | |||||
| Mean | SD | Median | Min | Max | ||
| Before | 26 | 24.5 | 5.0 | 24 | 17 | 40 |
| 1st year | 25 | 15.3 | 3.1 | 15 | 7 | 22 |
| 2nd year | 18 | 16.7 | 2.7 | 17 | 13 | 25 |
| 3rd year | 9 | 18.6 | 5.1 | 17 | 13 | 28 |
| 4th year | 4 | 16 | 6.9 | 18 | 6 | 22 |
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