Table 1.
Demographics, clinical details and acuity thresholds of all subjects.
| Acuity threshold (mm) | ||||||||
|---|---|---|---|---|---|---|---|---|
| Subject | Age | Sex | Cause of blindness | Age at time of total blindness (yrs) | Dominant hand | Braille-reading hand | R | L |
| EARLY BLIND | ||||||||
| EB1 | 21 | M | optic nerve hypoplasia | Birth | R | L | 1.75 | 1.19 |
| EB2 | 30 | F | retinopathy of prematurity | 1.5 | R | R | 1.37 | 1.94 |
| EB3 | 56 | F | retinopathy of prematurity | Birth | R | L | 1.64 | 1.29 |
| EB4 | 21 | M | retinoblastoma | 1.5 | R | L | 1.19 | 0.45 |
| EB5 | 46 | F | retinopathy of prematurity | 3 | R | Both | 1.49 | 1.10 |
| Mean | 35 | 1.49 | 1.19 | |||||
| LATE BLIND | ||||||||
| LB1 | 54 | F | inverse retinitis pigmentosa | 44 | R | L | 1.94 | 0.53 |
| LB2 | 40 | M | retinal detachment | 34 | L | L | 1.60 | 1.87 |
| LB3 | 34 | M | Coates’ disease | 10 | R | R | 1.19 | 0.80 |
| LB4 | 43 | M | retinopathy of prematurity, glaucoma | R: 30; L: 40 | Ambidextrous | - | 1.30 | 1.12 |
| LB5 | 43 | M | retinopathy of prematurity, glaucoma | 15 | L | Both | 0.56 | 0.45 |
| Mean | 43 | 1.32 | 0.95 | |||||