nystagmus retractorius

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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.

Last reviewed 07/2021