Third cranial nerve palsy; Oculomotor palsy; Pupil-involving third cranial nerve palsy
- Drooping of one eyelid (ptosis)
- Enlarged pupil that reacts poorly to light
- Headache or eye pain
Other symptoms may occur if the cause is a tumor or trauma. Decreasing consciousness is a serious sign, because it could indicate brain damage or impending death.
Signs and tests
An eye examination may show:
- Enlarged (dilated) pupil of the affected eye
- Eye movement abnormalities
- Eyes that are not aligned (dysconjugate gaze)
A complete medical and nervous system (neurological) examination is performed to find out if any other parts of the body are affected.
Other tests may include:
- Blood tests
- Tests to look at blood vessels to the brain (
cerebral angiogram, CT angiogram, or MR angiogram) MRIor CT scan of the brain Spinal tap(lumbar puncture)
You may need to be referred to a doctor who specializes in vision problems related to the nervous system (neuro-ophthalmologist).