Address underlying acute pathology
May require surgical correction
+/- Neurology consult
Fourth nerve palsy
Increased intracranial pressure 
Third nerve palsy
Vascular:  Stroke, subarachnoid hemorrhage, aneurysm 
Sixth nerve palsy
Neoplastic: Tumor in the subarachnoid space
Ulnar neuropathy
Degenerative/deficiency: Vitamin B12 deficiency, Wernicke-Korsakoff syndrome