Refractive status of participants in a study comparing ready-made spectacles (RMS) to custom-made spectacles (CS) in India
| RMS (n=193) | CS (n=1937) | |
| Uncorrected visual acuity (logMAR) | 0.56 (±0.21) | 0.57 (±0.21) |
| Equivalent vision sphere (EVS) (dioptres, power vector length) | 2.22 (±1.31) | 2.34 (±1.40) |
| Myopia EVS*, n (%) | 133 (68.9) | 148 (75.1) |
| Degree of myopia (dioptres), mean (±SD) | −2.07 (±1.27) | −2.19 (±1.44) |
| Maximum myopia (dioptres) | −7.50 | −8.50 |
| Hyperopia EVS*, n (%) | 60 (31.1) | 49 (24.9) |
| Degree of hyperopia (dioptres), mean (±SD) | 1.68 (±1.33) | 1.77 (±1.17) |
| Maximum hyperopia (dioptres) | 8.50 | 5.50 |
| Astigmatism* ≥0.75 and <2.00 dioptres, n (%) | 45 (23.3) | 57 (28.9) |
| Degree of astigmatism (dioptres), mean (±SD) | −1.16 (±0.32) | −1.07 (±0.35) |
| Astigmatism* ≥2.00 dioptres, n (%) | 13 (6.7) | 12 (6.1) |
| Degree of astigmatism (dioptres), mean (±SD) | −2.44 (±0.66) | −2.25 (±0.38) |
| Anisometropia, ≥1 and <2 dioptres difference, n (%) | 10 (5.2) | 12 (6.1) |
| Difference (dioptres), mean (±SD) | 1.24 (±0.25) | 1.28 (±0.25) |
| Anisometropia, ≥2 dioptres difference, n (%) | 5 (2.6) | 4 (2.0) |
| Difference (dioptres), mean (± SD) | 2.60 (±0.41) | 2.72 (±0.56) |
*For the eye with lower refractive error.