Demographic data of study groups and clinical measures at randomisation
| Characteristic | Base-in prism reading glasses (n = 36) | Placebo reading glasses(n = 36) |
|---|---|---|
| D, dioptre; Δ, prism dioptre; OD, oculus dexter; OS, oculus sinister. | ||
| Mean (SD) age (years) | 11.5 (2.3) | 11.0 (2.0) |
| Sex (%) | ||
| Boys | 36.1 | 52.8 |
| Girls | 63.9 | 47.2 |
| Race (%) | ||
| African American | 36.1 | 36.0 |
| American Indian | 2.8 | 2.0 |
| White | 55.6 | 61.1 |
| Other | 5.6 | 0.0 |
| Mean (SD) accommodative amplitude (D) | 8.5 (4.3) | 10.8 (4.3) |
| Mean (SD) accommodative facility (cycles/min) | 6.6 (4.6) | 6.7 (5.0) |
| Mean (SD) exophoria (Δ) | ||
| Distance | 2.36 (2.9) | 1.61 (1.9) |
| Near | 11.19 (3.7) | 10.44 (3.9) |
| Mean (SD) refractive error (spherical equiv) (D) | ||
| OD | 0.30 (0.84) | 0.17 (1.09) |
| OS | 0.23 (0.84) | 0.20 (1.04) |