Dissociated Vertical Divergence

Dissociated vertical divergence: a righting reflex gone wrong.

Dissociated vertical divergence (DVD) is an ocular motor disorder characterized by a slow, upward drift of 1 eye when the other eye is fixating a target. I propose that DVD is a dorsal light reflex in which asymmetrical visual input to the 2 eyes evokes a vertical divergence movement of the eyes. This primitive visuo-vestibular reflex functions as a righting response to restore vertical orienta...

Dissociated Vertical Deviation

DOS Times Vol. 12, No. 3 September, 2006 Dissociated Vertical Deviation (DVD) is one of the least understood forms of strabismus. It was first described by Stevens as double vertical strabismus, other common names given to this anomaly are, Alternating hyperphoria (Crone), Anaphoria / anatropia (Stevens), Periodic vertical squint (Anderson), Strabismus sursoadductorius (Cords). The term "Dissoc...

Relative roles of luminance and fixation in inducing dissociated vertical divergence.

PURPOSE We evaluated the roles of luminance and fixation in the pathophysiology of dissociated vertical divergence (DVD). METHODS Vertical eye position was measured in 6 subjects with DVD (ages 11-47 years, 5 females) and 6 controls (ages 16-40 years, 5 females) using video-oculography (VOG) under conditions of change in fixation and luminance. RESULTS Subjects with DVD showed the following...

Management of Dissociated Vertical Deviation.

Unexplained head tilt following surgical treatment of congenital esotropia: a postural manifestation of dissociated vertical divergence.

BACKGROUND Strabismus surgery for congenital esotropia can be complicated by the development of a postoperative head tilt. PURPOSE To determine the pathophysiology of acquired head tilting following horizontal realignment of the eyes in children with congenital esotropia. MATERIALS AND METHODS Retrospective analysis of nine children with congenital esotropia who developed unexplained head t...