nystagmus retractorius

Last reviewed 07/2021

Convergence nystagmus consists of slow abduction of the eyes, followed by rapid adduction.

There is often an associated rhythmical retraction of the eyes termed nystagmus retractorius.

The cause is a lesion in the ventral midbrain, usually a tumour or infarct, and is usually associated with other features of Parinaud's syndrome.