Two-muscle surgical treatment of a compensatory head tilt in an adult with acquired downbeat nystagmus.

Kestenbaum-Anderson-like operations have proven beneficial in treatment of compensatory head tilt in patients with infantile nystagmus. However, their use in acquired vertical nystagmus in adults with head tilt has rarely been reported. Presented here is a case of a 52-year-old woman with acquired downbeat nystagmus with a significant head tilt who responded to a simple two-muscle surgery involving the superior recti. Cyclovertical muscle surgery should be considered a viable option in such patients who are refractory to medical intervention. Additionally, it appears that four-muscle vertical muscle recessions (two muscles per eye) may not be necessary to dampen vertical nystagmus since good results can be obtained with a single muscle recession bilaterally.