Duane's retraction syndrome.

DUANE'S retraction syndrome (Duane, 1905) is frequently but not invariably associated with convergent strabismus when the eyes are in the primary position (Duke-Elder, 1964); if a head-turn is present, it will be in the direction of action of the paretic lateral rectus muscle. In the atypical retraction syndrome, the medial rectus is more paretic than the lateral rectus muscle; there is exophoria in the primary position and the head-turn will be in the direction of the paretic medial rectus muscle (Brown, 1958). It is unusual to find exophoria or exotropia with headturning in the direction of action of the less paretic rectus muscle in atypical Duane's syndrome. Saiduzzafar (1959) and Keith (1961) each reported one case affecting the left eye with head-turning to the right. A similar case of Duane's syndrome affecting the left eye with exotropia and head-turning to the right is described here.