Prevalence of refractive error in Portugal ¿ A systematic review and meta-analysis Vera Lúcia Alves Carneiro; José Manuel González-Méijome;

The prevalence of refractive errors in college students in Israel Einat Shneor; Ravid Doron; Lisa A Ostrin; Ariela Gordon-Shaag;

Refractive status of patients attending eye clinics of the Public Health System from Aguascalientes, Mexico Luis Fernando Barba-Gallardo; Luis Héctor Salas-Hernández; José Rafael Villafán-Bernal; Paloma del Sagrario Marín-Nájera; Diana Miranda García-López; Aquetzally Del Carmen López-Garcia; Itandehui Castro-Quezada;