| Outflow Pathway | Surgery | IOP Reduction | Medication Reduction |
|---|---|---|---|
| Subconjunctival | Trabeculectomy4 | 49.5% at 5 years | 1.5 at 5 years |
| Aqueous shunt4 | 41.4% at 5 years | 1.4 at 5 years | |
| Ex-PRESS8 | 44% at 2 years | 3.4 at 2 years | |
| XEN9 | 36.4% at 1 year | 1.8 at 1 year | |
| Trabecular | iStent10 | 20% at 1 year | 1.2 at 1 year |
| Hydrus*11 | 36% at 2 years | 1.5 at 2 years | |
| Trabectome12 | 52% at 1 year | 1.3 at 1 year | |
| Suprachoroidal | Cypass*13 | 30% at 2 years | 1.2 at 2 years |