The investigators evaluated 250 male, type 2 diabetic patients, aged 18-80 years. They will undergo IIEF (International Index of Erectile Function), SAS of Zung (self-rating anxiety state)and SDS of Zung (self-rating depression scale)questionnaires. The investigators will evaluate anthropometric and biochemical parameters, dysautonomic function index, IMT (Intima Media Thickness) index, and fundus oculi examen. Furthermore, the investigators will perform MNSI (Michigan Neuropathy Screening Instrument) and NDS (Neuropathy Disability Score)questionnaires.