Rosai-Dorfman is a usually benign disease which is characterized by over production and accumulation of a specific type of white blood cell in the lymph nodes, most often those of the neck region. Different organs including the central nervous system may be affected in rare cases. The aim of the present manuscript is to report visual pathway disturbances measured using in a case of Rosai-Dorfman with central nervous system involvement using electroretinography and visual evoked potential techniques.Keywords: Histiocytosis; Sinus; Electroretinography; Evoked potentials; Visual
