Strabismus

Ocular motility disorder characterized by constant or intermittent misalignment of the visual axes, preventing normal binocular fusion, and resulting from imbalance or dysfunction of the extraocular muscle or their innervation. Possible causes are uncorrected refractive errors (hyperopia in children), neurological disease (cerebral palsy, Down syndrome, hydrocephalus, stroke, brain tumor, traumatic brain injury), Graves' disease, myasthenia gravis, botulism, diabetes, trauma, and vision loss during childhood.