miosis (pupillary constriction)

Introduction

Contraction or constriction of the pupil.

Etiology

• Horner syndrome
• pancoast tumor
• pharmaceutical agents
  • antineoplastic agents
  • tramadol
  • codeine
  • opiates
    • fentanyl
    • morphine
    • heroin
    • methadone
  • antipsychotics
    • haloperidol
    • olanzapine
    • quetiapine
  • parasympathomimetics
    • acetylcholine
    • bethanechol
    • carbachol
    • cholinesterase inhibitor
      • pilocarpine
      • phisostigmine
      • neostigmine
    • lobeline
    • methacholine
  • MAO inhibitors
  • mirtazapine
  • trazodone
  • phenoxybenzamine
• poisoning
  • donepezil toxicity
  • organophosphate toxicity
  • clonidine toxicity
  • phencyclidine toxicity
• intracranial hemorrhage
• pontine hemorrhage
• lateral medullary syndrome
• migraine
• cluster headache
• cerebrovascular arteriosclerosis
• corneal foreign body
• corneal ulcer
• hyphema
• acute iritis
• uveitis
• neuropathy
• Parry-Romberg syndrome
• Wallenberg's syndrome

Physiology

• miosis & visual accomodation are controlled by the oculomotor nerve (parasympathetic).

Notes

also see mydriasis (dilation of the pupil)

More general terms

• sign/symptom

Additional terms

• mydriasis