The profile of astigmatism in 6¿12-year-old children in Iran Hassan Hashemi; Amir Asharlous; Mehdi Khabazkhoob; Abbasali Yekta; Mohammad Hassan Emamian; Akbar Fotouhi;

Prevalence of refractive error within a Portuguese sample of optometric records Vera Lúcia Alves Carneiro; José Manuel González-Méijome;

Percentile curves of refractive errors in a Spanish paediatric population Clara Martínez-Pérez; Belen Pérez-Sánchez; César Villa-Collar;