[Numerical reflections concerning alternating torticollis with nystagmus and binocular functions (author's transl)].

The authors describe a patient suffering from torticollis with an eccentric neutral point of relative rest caused by a congenital nystagmus (rotation to the left for long-range vision and to the right for close-range vision - nystagmus alternans); the torticollis is not aggravated in close-range vision by an asymmetrical Anderson-Kestenbaum operation at a suitable range (asymmetrical correction of the torticollis for long-range vision by exploiting the range of fusion into divergence). Surgical alternatives are discussed and trigonometric relations are correlated with clinical experience (for torticollis with binocular functions). Torticollis without binocular functions is discussed in brief.