The exact etiology of this syndrome is unknown, and some studies have shown that the signs and symptoms develop from an average range of 24 to 107 hours after surgery and may take weeks to months to resolve.
This syndrome involves a variety of signs and symptoms including mutism or speech disturbances, dysphagia, decreased motor movement, emotional lability and cranial nerve palsies.
Crossed eyes or strabismus can be an indication that a cranial nerve has a lesion (lesion in either of cranial nerve 3,4 and 6 will result in the lack of innervation to eye muscles and in a change of eye position.)
Third Cranial Nerve Palsy usually presents with sudden onset of double vision, the eyelid is usually droopy and there may be significant pain. The pupil can be involved or spared like in your case.
Have you noticed some improvements of your symptoms, besides speech improvement, since the onset of this syndrome?