Brown syndrome is a rare eye disorder characterized by defects in eye movements caused by abnormalities of the superior oblique tendon sheath of the superior oblique muscle. The disease is Monarch Disease Ontology term MONDO_0014624 (Brown syndrome). Also known as: BRWNS, Brown tendon sheath syndrome, Brown's (tendon) sheath syndrome, Brown's sheath syndrome, Brown's tendon sheath syndrome, superior oblique tendon sheath syndrome, tendon sheath adherence, Superior oblique.