Demographic characteristics of the study population (n=16)
| n | % | Range | |
| Gender | |||
| Female | 7 | 44 | |
| Male | 9 | 56 | |
| Age in years (mean ± SD) | 51±13 | 30–77 | |
| Work status | |||
| Occupational disability | 6 | 38 | |
| Voluntary work | 5 | 31 | |
| Employed | 4 | 25 | |
| Retired | 1 | 6 | |
| Marital status, living together | 11 | 69 | |
| Primary cause of visual impairment | |||
| Retinitis pigmentosa | 4 | 25 | |
| Glaucoma | 2 | 13 | |
| Ablatio retinae | 2 | 13 | |
| Neurosarcoidosis | 1 | 6 | |
| Congenital cataract | 1 | 6 | |
| Usher syndrome | 1 | 6 | |
| Ocular albinism | 1 | 6 | |
| Retinoblastoma | 1 | 6 | |
| Leber congenital amaurosis | 1 | 6 | |
| Choroideremia | 1 | 6 | |
| Diabetic retinopathy | 1 | 6 | |
| Time since diagnosis in years (mean ± SD) | 18±15 | 1–49 | |
| Comorbid diseases | 0–4 | ||
| 0 | 10 | 63 | |
| ≥1 | 6 | 37 | |
| Fatigue severity | |||
| FAS (mean ± SD) | 29±7 | 16–46 | |
| Fatigued (FAS≥22) | 14 | 88 | |
| Vision-related fatigue (mean ± SD) | 15±5 | 9–28 | |
| Depressive symptoms | |||
| PHQ-9 (mean ± SD) | 8±4 | 3–17 | |
| Moderate/severe symptoms (PHQ-9≥10) | 6 | 38 |
FAS, Fatigue Assessment scale; PHQ-9: Patient Health Questionnaire.