Diabetic third nerve palsy; Pupil-sparing third cranial nerve palsy
Definition of Cranial mononeuropathy III – diabetic type
Cranial mononeuropathy III — diabetic type — is usually a complication of that causes double vision and .
Causes, incidence, and risk factors
Cranial mononeuropathy III – diabetic type is a mononeuropathy, which means that only one nerve is damaged. It affects the third cranial (oculomotor) nerve, which is one of the cranial nerves that controls eye movement.
Signs and tests
An examination of the eyes will determine whether only the third nerve is affected or if other nerves have also been damaged. Signs may include:
There is no specific treatment to correct the nerve injury.
Many patients get better over 3 – 6 months, although some have permanent eye muscle weakness.
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Daniel B. Hoch, PhD, MD, Assistant Professor of Neurology, Harvard Medical School, Department of Neurology, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc. – 6/15/2010