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

Refractive error magnitude and variability: Relation to age Elizabeth L. Irving, Carolyn M. Machan, Sharon Lam, Patricia K. Hrynchak, Linda Lillakas

Refractive error among school children in Jhapa, Nepal Gauri Shankar Shrestha, Digen Sujakhu, Purushottam Joshi