Otálora L., M.J. et al. 2008. Comparative study between Monocular dynamic retinoscopy and retinoscopy under cycloplegia with 1% Tropicamide in childr en between 2 to 5 years old in Engativá, Bogotá. Ciencia y Tecnología para la Salud Visual y Ocular. 6, 10 (Jan. 2008), 65–70.