Table 3 Prevalence of refractive errors of children with vision impairment
From: Vision impairment in boys recruited to the iREAD study
| Â | Monocular N | Binocular N | Total N (%) [CI] |
|---|---|---|---|
Emmetropia (SER − 0.50 to + 0.50 D) | 0 | 1 | 1 (2.1%) [0.4–11.1%] |
Myopia (SER ≤ − 0.50 D) | 5 | 35 | 40 (85.1%) [72.3–92.6%] |
Total Hyperopia (SER ≥  + 0.50 D) | 3 | 3 | 6 (12.8%) [6.0–25.2%] |
 Hyperopia (SER ≥  + 0.50 D to 2.50 D) | 1 | 1 | 2 (4.3%) [1.2–14.3%] |
 Significant Hyperopia (SER ≥ 2.50 D) | 1 | 2 | 4 (8.5%) [3.4–19.9%] |
Total Astigmatism | 5 | 12 | 17 (36.2%) [24.0–50.5%] |
 Significant astigmatism (≤ − 3.00D) | 0 | 1 | 1 (2.1%) [0.4–11.1%] |
 Astigmatism (≤ − 0.75D) | 5 | 10 | 15 (31.9%) [20.4–46.2%] |
Only Astigmatism (Emmetropia) | 1 | 0 | 1 (2.1%) [0.4–11.1%] |