Cranial mononeuropathy III – diabetic type

Alternative Names

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.

Expectations (prognosis)

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

Central nervous system

ADAM Medical Encyclopedia

Article written by

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission ( URAC's accreditation program is an independent audit to verify that A.D.A.M. follows rigorous standards of quality and accountability.