title: Safety of Spectacles for Children's Vision: A Cluster-Randomized Controlled Trial.
authors.affiliation: Floridablanca and Bucaramanga, Colombia.
authors.forename: Virgilio
authors.initials: V
authors.lastname: Galvis
authors.affiliation: Floridablanca and Bucaramanga, Colombia.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Tello
authors.affiliation: Floridablanca and Bucaramanga, Colombia.
authors.forename: M Margarita
authors.initials: MM
authors.lastname: Parra
mesh_terms: D005139:Eyeglasses / Q000592:standards*; D005260:Female; D006801:Humans; D008297:Male; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000628:therapy*; D014792:Visual Acuity; D019987:Persons with Visual Disabilities / Q000534:rehabilitation*