An abnormal ocular motor manifestation of Joubert syndrome.

Joubert syndrome is a congenital neurodevelopmental disorder primarily affecting the midbrain and hindbrain. It is characterized by ataxia, hypotonia, and developmental delay as well as apnea or abnormal ocular motor function. We describe and present a video of a child with Joubert syndrome with an alternating skew deviation in primary position rather than on lateral gaze, which is a more characteristic phenotype of this condition.