[Prismatic and surgical block in nystagmus]

After the speech of some teoretical notions (classification, ethyology, clinical description, treatment) about nystagmus are presented the summaries of dossiers of five patients consultated in our clinic with the diagnostic of nystagmus. At two from them realised the complete blockade at the contractions with prisms and at two from en the partial blockade too with prisms. One of them presenting nystagmus associate with strabismus was surgical solved.