Treatment for third nerve palsy depends on what caused it. There is no treatment to re-establish function of a congenital third nerve palsy. An acquired third nerve palsy may resolve on its own, depending on the cause. If a brain tumour or aneurysm is causing the third nerve palsy, surgery to relieve pressure on the third nerve may help it function.
A Neuro-ophthalmologist will wait at least 6 months after onset of third nerve palsy to see if it gets better on its own. During this time, an eye patch or prism glasses may help you with double vision. Eye muscle surgery (strabismus surgery) may help to realign the eyes so that the eyes are straight when looking straight ahead. But it can sometimes take numerous procedures. People typically still experience double vision when looking to the sides after strabismus surgery.