Rev Bras Oftalmol.2025;84:e0073
Bilateral Duane syndrome type 3: a rare entity
DOI: 10.37039/1982.8551.20250073
ABSTRACT
Duane Syndrome (DS) is a rare ocular disorder that causes congenital strabismus. It results from a failure of the abducens nerve (VI cranial nerve) to innervate the lateral rectus muscle, in addition to anomalous innervation of this muscle by the oculomotor nerve (III cranial nerve). The syndrome is characterized by restricted movements of adduction and abduction, narrowing of the palpebral fissure, abnormal ocular movements, and globe retraction. It affects about 0.1% of the population and accounts for 1-4% of strabismus cases. It is usually unilateral and more common in women. The purpose of this case report is to demonstrate an atypical form of DS, enhancing the diagnosis of the disease and providing the medical community with greater support. DS should always be considered in the differential diagnosis of strabismus cases, and patients should always be evaluated for other systemic abnormalities, especially in bilateral cases.
