Portal de Periódicos da CAPES

Dissociated Vertical Divergence

1999; American Medical Association; Volume: 117; Issue: 9 Linguagem: Inglês

10.1001/archopht.117.9.1216

1538-3601

Michael C. Brodsky,

Glaucoma and retinal disorders

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 orientation in lower lateral-eyed animals by equalizing binocular visual input. The dorsal light reflex is suppressed in humans but can manifest as DVD when early-onset strabismus precludes normal binocular development.