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(A) Primary outcome for IOP 6–21 mmHg at 1 year; (B) reasons for treatment failure
| (A) Primary outcome | No of eyes (%) |
| Complete success | 54 (51.9) |
| Qualified success | 17 (16.4) |
| Failure | 33 (31.7) |
| (B) Reasons for failure | Total no (%) |
| IOP >21 mmHg | 14 (13.5) |
| <20% IOP reduction | 24 (23.1) |
| IOP ≤5 mmHg with vision loss on two consecutive visits | 0 |
| Reoperation for glaucoma | 14 (13.5) |
| Loss of light perception vision | 0 |
IOP, intraocular pressure.
