| Refraction | n = 75 | % |
| Presbyopic | 16 | 21.3 |
| Emmetrope | 44 | 58.7 |
| Hyperopia | 8 | 10.6 |
| Myopic | 7 | 9.3 |
| Astigmatism | 1 | 1.3 |
| Pathological binocular vision | 2 | 2.7 |