| Degree of excavation of the papillae (C/D) | Right Eye (RE) | Left Eye (LE) | ||
| Number | % | Number | % | |
| <0.5 | 2 | 2.9 | 3 | 4.4 |
| 0.5 ≤ C/D < 0.8 | 34 | 50.0 | 28 | 41.2 |
| ≥0.8 | 32 | 47.1 | 37 | 54.4 |
| In all | 68 | 100.0 | 68 | 100.0 |