Aberrant regeneration of the third cranial nerve is a well-known condition that can develop after head trauma or intracranial aneurysms. Horizontal gaze-eyelid synkinesis, pseudo-V on Graefe phenomenon, and limited elevation and depression of the eyelid with retraction of the globe are common signs of aberrant regeneration of the third nerve. These features may appear months to years after third nerve injury. Patients who have suffered severe head trauma or have had an intracranial aneurysm near the third cranial nerve should be followed in consultation with ophthalmologists. They should also be told about the possibility of aberrant regeneration of this nerve, and about the features of this condition.