Colour vision and contrast sensitivity losses of mercury intoxicated industry workers in Brazil - Ventura, Dora Selma Fix; Simões, A L; Tomaz, S; Costa, Marcelo Fernandes da; Lago, M; Costa, M T V; Canto-Pereira, L H M; Souza, J M de; Faria, M A M; Silveira, L C L (Environmental Toxicology and Pharmacology, 2005)