latent nystagmus

A conjugate, horizontal jerk nystagmus that manifests only under monocular viewing conditions. The fast phase always beats toward the fixating eye, while the slow phase drifts nasally.
Latent nystagmus is associated with infantile strabismus, amblyopia, and dissociated vertical deviation, and is thought to arise from maldevelopment of cortical binocular connections. It may convert to manifest latent nystagmus if binocularity is disrupted.