| Author | Study | n | Dose (mg) | VA outcomes | Follow-up | Subgroup analysis (age, PDT) |
| Tewari | Retrospective | 1 | 1.25 | Snellen equivalent | 6 months | – |
| Laud | Retrospective | 4 | 1.25 | Snellen equivalent | 7.3 months | – |
| Yamamoto | Retrospective | 11 | 1.25 | Snellen equivalent | 153 (35–224) days | – |
| Sakaguchi | Prospective | 8 | 1 | Snellen equivalent | 4.4 (3–7) months | – |
| Hernández-Rojas | Prospective | 14 | 2.5 | Snellen equivalent | 3 months | – |
| Arias | Prospective | 17 | 1.25 | ETDRS letters | 6 months | Yes |
VA, visual acuity; ETDRS, Early Treatment Diabetic Retinopathy Study; PDT, photodynamic therapy.