A complete<unk>  will result in a characteristic displacement outward (exotropia) and downward (hypotropia). The outward displacement occurs because the lateral rectus muscle (innervated by the sixth cranial nerve) maintains muscle tone in comparison to the paralyzed medial rectus. The downward displacement occurs because the superior oblique muscle (innervated by the fourth cranial or trochlear nerve) is unantagonized by the paralyzed superior rectus, inferior rectus and inferior oblique. The affected individual will also have a ptosis, or drooping of the eyelid, and mydriasis (pupil dilation).
Oculomotor nerve palsy
Nasolacrimal duct obstruction
Optic nerve tumor
Vibroacoustic disease
Auditory neuropathy
Ocular ischemic syndrome
Cat eye syndrome
Phantom eye syndrome