Diagnosaurus
Constricted pupil
DDx
- Opioids (pinpoint)
- Other causes of sympatholytic poisoning, e.g., benzodiazepines, clonidine
- Horner's syndrome
- Myotic drugs, e.g., pilocarpine
- Neurosyphilis (Argyll Robertson pupils)
- Pontine infarct
- Uveitis
- Inflammatory adhesions between iris and lens (posterior synechiae)
- Cholinergic poisoning, e.g., organophosphates
- Physiologic anisocoria (unequal pupils, react normally)
There's more to see -- the rest of this topic is available only to subscribers.
Last updated: December 1, 2014
Citation
Zeiger, Roni F.. "Constricted Pupil." Diagnosaurus, 4th ed., McGraw-Hill Education, 2014. Emergency Central, emergency.unboundmedicine.com/emergency/view/Diagnosaurus/114389/all/Constricted_pupil.
Zeiger RFR. Constricted pupil. Diagnosaurus. McGraw-Hill Education; 2014. https://emergency.unboundmedicine.com/emergency/view/Diagnosaurus/114389/all/Constricted_pupil. Accessed May 17, 2025.
Zeiger, R. F. (2014). Constricted pupil. In Diagnosaurus (4th ed.). McGraw-Hill Education. https://emergency.unboundmedicine.com/emergency/view/Diagnosaurus/114389/all/Constricted_pupil
Zeiger RFR. Constricted Pupil [Internet]. In: Diagnosaurus. McGraw-Hill Education; 2014. [cited 2025 May 17]. Available from: https://emergency.unboundmedicine.com/emergency/view/Diagnosaurus/114389/all/Constricted_pupil.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC
T1 - Constricted pupil
ID - 114389
A1 - Zeiger,Roni F,
Y1 - 2014/12/01/
BT - Diagnosaurus
UR - https://emergency.unboundmedicine.com/emergency/view/Diagnosaurus/114389/all/Constricted_pupil
PB - McGraw-Hill Education
ET - 4
DB - Emergency Central
DP - Unbound Medicine
ER -
