Table 1. Classification of defects of the optic nerve damage.
| Defect | Type | Description |
|---|---|---|
| 0 |
Normal |
Without lesion |
| 1 |
Initial defect |
Focal deficiency in 1 or more pole that do not reach up to the papillary edge |
| 2 |
Small defect |
Focal deficiency in 1 pole that reach to the papillary edge |
| 3 |
Middle Defect |
Focal deficiency in 1 or more pole that reach papillary edge (Notch) |
| 4 |
Middle severe defect |
Focal deficiency in 1 or more pole that reach the papillary edge (Notch) plus hemorrhage or β zone |
| 5 |
Severe defect |
Cup/Disc ratio above 09/09 |
| 6 | Null | Cup/Disc ratio total (10/10) |