[The significance of vision disorders in the early diagnosis of subacute sclerosing panencephalitis].

Visually evoked potentials were studied in a group of ten patients with subacute sclerosing panencephalitis. In all cases the results indicated an impairment of the optical system in relationship to the individual phase of the disease. This examination technique is a valuable aid in the early diagnosis and observation of the course of subacute sclerosing panencephalitis.