| Inter-item range (mean) | Item-total range (mean) | Cronbach alpha | Skewness | |
| Overall eyesight | – | – | – | −0.4 |
| General functioning | 0.26 to 0.66 (0.46) | 0.51 to 0.81 (0.70) | 0.90 | −1.1 |
| Psychosocial | 0.34 to 0.69 (0.45) | 0.62 to 0.83 (0.76) | 0.77 | −0.5 |
| Pain/discomfort in eye | – | – | – | 0.1 |