III nerve palsy with pupillary sparing is seen in -
Pupil-sparing oculomotor nerve palsy is often assumed to be caused by ischemic injury such as hypeension and diabetes mellitus. Sometimes compressive lesion can cause pupil-sparing oculomotor nerve palsy with a sho interval from the onset of symptoms to diagnosis.
Craniopharyngioma
Hypotension
Aneurysm of post, communicating aery
DM
Ocular motility and squint