Extrascleral tumour extension by location
| Patient | Extrascleral extension location | Clock hour | Distance from limbus (mm) | Preoperative UBM diameter (mm) | Preoperative UBM thickness* (mm) |
| 1 | Temporal pars plana | 08:00 | 6 | 2.9 | 2.4 |
| 2 | Nasal pars plana | 08:00–09:30 | 5 | 4.5 | 1.3 |
| 3 | Nasal pars plana | 09:00 | 5.5 | 4.5 | 0.9 |
| 4 | Nasal anterior choroid | 15:30 | 7 | 4.1 | 1.4 |
| 5 | Temporal anterior choroid | 09:00 | 8.5 | 2 | 1.6 |
*For comparison, the normative UBM thickness of the ciliary body is 1.3.24
mm, millimetre; UBM, ultrasound biomicroscopy.