Screening positives | Hospital follow-up (n = 39) | ||
Autorefractor (n = 16) | Orthoptist (n = 46) | ||
VA⩽0.175 both eyes | 9 | 10 | |
Difference in VA of ⩾1 line (0.1 logMAR) | 26 | 17* | |
Manifest strabismus | 8 | 8 | |
Latent strabismus with slow recovery | 15 | 10 | |
Ptosis | 4 | 4 | |
Media opacities | 1 | ||
Reduced convergence | 4 | 2 | |
Failure to overcome 20 PD base out prism | 3 | 2 | |
No reading possible | 7 | ||
Any anisometropia >1.0 D | 6 | 6 | |
Anisometropia of cylindrical component >1.0 D | 5 | 4 | |
Anisometropia of spherical component >1.0 D | 3 | 5 | |
Cylinder power >1.5 D | 2 | 5 | |
Hypermetropia: spherical component >3.0 D | 1 | 13 | |
Myopia: spherical component <−1.0 D | 0 | 1 | |
Software error (referral recommended although criteria not fulfilled) | 2 |
Figures show number of children for either method. Numbers add up to more than total n, as some children were positive for several referral criteria.
*Of 26 children with difference in visual acuity (VA) at screening, six did not attend follow-up appointment, and three had bilaterally reduced visual acuity (VA) at follow-up.