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  • Ocular motility disorders include gaze palsy, internuclear ophthalmoplegia, oculomotor nerve lesions, trochlear nerve lesions, abducens nerve lesions, diabetic ophthalmoplegias, painful ophthalmoplegias, myesthenia gravis, and ocular myopathies. Extraocular muscles controlling eye movements are medial and lateral rectus, inferior and superior rectus, and superior and inferior oblique. Cranial nerve palsies resulting in eye movement disorders are: Oculomotor nerve palsy - may be caused by brain injury, aneurysm, hemorrhage, tumor, or diabetes; affected eye turns outward when the unaffected eye looks straight ahead; this causes double vision. Trochlear nerve palsy - often has no identified cause but may be due to head injury; both eyes or only one may be affected; affected eye is not able to turn inward or down; double vision results. Abducens nerve palsy - may have a number of causes including head injury, tumors, multiple sclerosis, aneurysms, CNS infection, etc.; affected eye cannot turn outward.
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