Pupillary constriction
More common causes
Opioid use disorder
Organophosphate poisoning
Uveitis
Less common causes
Head injury
Horner's syndrome
Cluster headache
Uncommon causes
Argyll Robertson pupil
Pontine hemorrhage
Pharmacological causes
Carbachol
Codeine sulfate
Dapiprazole
Neostigmine
Phenoxybenzamine hydrochloride
Physostigmine
Pilocarpine hydrochloride