P of each category of refractive error (better eye) at primary screening and detailed evaluation
| Primary screening | Boys | Girls | Total | |||
| Refractive error (D) | n=1 021 715 | P (95% CI) | n=1 002 338 | P (95% CI) | N=2 024 053 | P (95% CI) |
| Mean SE | ||||||
| Myopia (≤−0.5) | 28 292 | 2.77 (2.74 to 2.80) | 32 435 | 3.24 (3.20 to 3.27) | 60 727 | 3.00 (2.98 to 3.02) |
| Hyperopia (≥+1.0) | 5479 | 0.54 (0.52 to 0.55) | 5176 | 0.52 (0.50 to 0.53) | 10 655 | 0.53 (0.52 to 0.54) |
| Astigmatism (≥−0.5) | 34 019 | 3.33 (3.29 to 3.36) | 36 792 | 3.67 (3.63 to 3.71) | 70 811 | 3.50 (3.47 to 3.52) |
| Anisometropia (SE_RE-SE_LE >1.0) | 2733 | 0.27 (0.26 to 0.28) | 2788 | 0.28 (0.27 to 0.29) | 5511 | 0.27 (0.27 to 0.28) |
| Detailed evaluation | Boys | Girls | Total | |||
| Refractive error (D) | n=65 043 | P (95% CI) | n=72 105 | P (95% CI) | n=137 148 | P (95% CI) |
| Mean SE | ||||||
| Myopia (≤−0.5) | 28 292 | 43.50 (43.12 to 43.88) | 32 435 | 44.98 (44.62 to 45.35) | 60 727 | 44.28 (44.02 to 44.54) |
| Hyperopia (≥+1.0) | 5479 | 8.42 (8.21 to 8.64) | 5176 | 7.18 (6.99 to 7.37) | 10 655 | 7.77 (7.63 to 7.91) |
| Astigmatism (≥−0.5) | 34 019 | 52.30 (51.92 to 52.69) | 36 792 | 51.03 (50.66 to 51.39) | 70 811 | 51.63 (51.37 to 51.90) |
| Anisometropia (SE_RE-SE_LE >1.0) | 2733 | 4.20 (4.05 to 4.36) | 2788 | 3.85 (3.71 to 4.00) | 5511 | 4.02 (3.91 to 4.12) |
| Spherical ametropia | Boys | Girls | Total | |||
| Primary screening | n=1 021 715 | P (95% CI) | n=1 002 338 | P (95% CI) | N=2 024 053 | P (95% CI) |
| Spherical ametropia | ||||||
| Myopia (spherical value ≤−0.50) | 21 788 | 2.13 (2.10 to 2.16) | 25 921 | 2.59 (2.56 to 2.62) | 47 709 | 2.36 (2.34 to 2.38) |
| Hyperopia (spherical value ≥+1.0) | 22 399 | 2.19 (2.16 to 2.22) | 23 036 | 2.30 (2.27 to 2.33) | 45 435 | 2.24 (2.22 to 2.27) |
| Total | 44 187 | 4.32 (4.29 to 4.36) | 48 957 | 4.88 (4.84 to 4.93) | 93 144 | 4.60 (4.57 to 4.63) |
| Astigmatism | ||||||
| Any myopic astigmatism (cylinder value ≥−0.5) | 34 019 | 3.33 (3.29 to 3.36) | 36 792 | 3.67 (3.63 to 3.71) | 70 811 | 3.50 (3.47 to 3.52) |
| Simple myopic astigmatism (‘0’ spherical value with any cylinder) | 10 424 | 1.02 (1.00 to 1.04) | 11 098 | 1.11 (1.09 to 1.13) | 21 522 | 1.06 (1.05 to 1.08) |
| Compound myopic astigmatism (‘−’ spherical value with any cylinder) | 14 812 | 1.45 (1.43 to 1.47) | 17 022 | 1.70 (1.67 to 1.72) | 31 834 | 1.57 (1.56 to 1.59) |
| Mixed astigmatism (‘+’ spherical value with any cylinder) | 13 981 | 1.37 (1.35 to 1.39) | 14 975 | 1.49 (1.47 to 1.52) | 28 956 | 1.43 (1.41 to 1.45) |
D, diopter; P, prevalence; SE, spherical equivalent.