| No of IOP-lowering drugs per patient (%) | |
| 0 | 29 (49.1) |
| 1 | 26 (44.1) |
| 2 | 4 (6.8) |
| Type of previous IOP-lowering medications used (%) | |
| Topical beta-blocker | 24 (40.7) |
| Prostaglandin analogues | 7 (11.9) |
| Cholinergic agonist | 3 (5.8) |
| Adrenergic agonist | 0 (0.0) |
| Carbonic anhydrase inhibitors | 0 (0.0) |
| Laterality | |
| Right | 20 (33.9) |
| Left | 11 (18.6) |
| Bilateral | 28 (47.5) |