Stereopsis in children with intermittent exotropia and dissociated vertical deviation.

Dissociated vertical deviation (DVD) is generally associated with early-onset esotropic strabismus and poor stereopsis. It is infrequently observed among patients with intermittent exotropia. In this cohort of 242 consecutive children with intermittent exotropia examined over a 17-year period, 25 (10.3%) were found to have DVD, 13 (52%) of whom had normal stereopsis. In the children with both intermittent exotropia and DVD, disease severity appears to depend more on the quality of stereopsis than on the presence of DVD.