A 6-year-old girl with restricted upward gaze of her right eye.

Brown syndrome is an incomitant strabismus syndrome characterized by inability of the eye to elevate during adduction. • Primary Brown syndrome is thought to occur due to the inability of the superior oblique tendon to stretch.However, there are many secondary causes of this condition that must be ruled out. • Despite significant misalignment of the eyes during upgaze, patients with Brown syndrome usually do not have decreased vision or diplopia with primary gaze. • Unlike paralytic strabismus, forced duction tests demonstrate restriction and a Parks' three-step test does not demonstrate a paralytic muscle. Spontaneous resolution is frequent, and surgical management typically is not indicated because of the high incidence of postoperative symptomatic superior oblique palsy.