Table 2 Measured distance from limbus to anterior plate border.
| Quadrant | Eye axial length | ||||
|---|---|---|---|---|---|
| 22.5 mm | 23.0 mm | 23.0 mm | 24.5 mm | 26.0 mm | |
| Superotemporal | |||||
| Molteno D1 | 13.0 | 13.5 | 13.0 | 14.0 | 15.0 |
| Ahmed (FP7 and S2) | 9.0 | 9.0 | 9.5 | 10.5 | 11.5 |
| Baerveldt | |||||
| 250 | 10.5 | 10.5 | 10.5 | 11.5 | 12.5 |
| 350 | 9.5 | 9.5 | 10.0 | 10.5 | 11.5 |
| Superonasal | |||||
| Molteno D1 | 11.5 | 11.5 | 12.0 | 12.5 | 14.0 |
| Ahmed (FP7 and S2) | 8.0 | 8.0 | 8.5 | 9.5 | 10.5 |
| Baerveldt | |||||
| 250 | 8.5 | 9.0 | 9.5 | 10.0 | 11.0 |
| 350 | 8.0 | 8.0 | 9.0 | 9.5 | 10.5 |
| Inferotemporal | |||||
| Molteno D1 | 15.0 | 15.5 | 16.0 | 16.5 | 17.0 |
| Ahmed (FP7 and S2) | 12.0 | 12.5 | 13.5 | 13.5 | 14.5 |
| Baerveldt | |||||
| 250 | 11.0 | 11.5 | 12.0 | 12.5 | 13.5 |
| 350 | 11.5 | 12.5 | 13.0 | 13.5 | 15.0 |
| Inferonasal | |||||
| Molteno D1 | 12.0 | 13.0 | 13.0 | 13.5 | 14.0 |
| Ahmed (FP7 and S2) | 9.5 | 9.5 | 9.5 | 10.0 | 11.0 |
| Baerveldt | |||||
| 250 | 10.0 | 10.5 | 10.5 | 11.0 | 12.0 |
| 350 | 9.0 | 9.5 | 10.0 | 10.5 | 11.5 |