Congenital see-saw nystagmus associated with retinitis pigmentosa.

Two sibling patients with see-saw nystagmus associated with advanced retinitis pigmentosa are presented. The see-saw nystagmus was most likely congenital but demonstrated a torsional pattern different from that previously reported for congenital see-saw nystagmus. Anatomic and etiologic factors associated with see-saw nystagmus are discussed.