Carried out by a doctor specialized in otorhinolaryngology, the vestibular examination serves to understand the origin of vertigo that give balance problems in patients of all ages, sex and social background. This is a particular painless procedure which involves introducing a small quantity of cold or lukewarm water into the inner ear, followed by precise movements of the patient's head, performed by the doctor. The involuntary movements of the patient's eyes (nystagmus) caused by this labyrinthine stimulation, will give the doctor the indications to arrive at a certain diagnosis.