Temporini, E.R. et al. 1977. The validity of the visual acuity screening in school children carried oat by the teacher - comparative study of the visual acuity measurement by the teacher and the ophthalmologist from the city of S. Paulo, Brazil . Revista de Saúde Pública. 11, 2 (Jun. 1977), 229–237. DOI:https://doi.org/10.1590/S0034-89101977000200007.