Rojas Verdugo, Erica Paola, and Carlos José Martínez Santander. “Grade of Visual Sharpness of the Students of the Career of Infimary of the Catholic University of Cuenca Extension Cañar”. Killkana Salud Y Bienestar, vol. 1, no. 2, Aug. 2017, pp. 27-30, https://doi.org/10.26871/killcana_salud.v1i2.71.