Dilator pupillae is supplied by
ref : A K Khurana ophthalmology 6th edition (page no:7) Ganong 23/e p261,265 dilator pupillae muscle is supplied by the sympathetic fibers from the carotid plexus which enter the Gasserian ganglion of 5th cranial nerves. ultimately reach the muscle along with long ciliary branches of nasociliary nerves (ophthalmic division 5th CN)
postganglionic parasympathetic from Edingerwest phal nucleas
Postganglioninc sympathetic from cervical sympathetic chain
Third cranial nerve
Sympathatic fibres of fronto-orbital branch of trigeminal nerve
Autonomic nervous system