Anisocoria (unequal pupil size)

​​​​Emergency

If acute onset anisocoria (unequal pupil size) with or without neurological signs is present or suspected, please refer the patient to the emergency department (via ambulance if necessary) or seek emergency medical advice via phone to on-call consultant/registrar

Criteria to access public outpatient services

CategoryCriteria
Category 1
Recommended to be seen within 30 calendar days.
  • Aged < 1 year with anisocoria (unequal pupil size)
Category 2
Recommended to be seen within 90 calendar days.
  • Longstanding anisocoria (unequal pupil size)

Information to include within a referral

Required

  • Reason for referral
  • Details of the presenting condition including timeframe of onset
  • Provisional diagnosis
  • Patient health summary (such as relevant medical history, relevant investigations, current medications and dosages, immunisations, allergies and/or adverse reactions)​

If available

  • Any associated changes to vision
  • Birth and pregnancy history​

Important information for referring health professionals

If there is a change to a patient’s condition while waiting for their appointment, referring health professionals may further investigate and manage the situation, or send an updated referral to the outpatient service. Where there are significant concerns about a patient's condition, referring health professionals may check HealthPathways for urgent/same day advice or contact the relevant clinical team.


 

Current as at: Monday 23 March 2026
Contact page owner: System Purchasing