TY - JOUR T1 - Early visual changes in diabetic patients with no retinopathy measured by color discrimination and electroretinography JO - Psychology & Neuroscience A1 - Gualtieri, Mirella A1 - Feitosa-Santana, Claudia A1 - Lago, Marcos A1 - Nishi, Mauro A1 - Ventura, Dora Fix SN - 1983-3288 UL - 10.3922/j.psns.2013.2.11 VL - 6 Y1 - 2013 PB - scielo ER -