Unequal Pupils

Unequal Pupils symptom guide: what it can mean, possible causes, and when to seek care. Educational only.

Overview

Unequal Pupils can be a symptom of many different conditions. This card offers general educational orientation only; a clinician can help assess causes and next steps. Seek care if symptoms are severe, sudden, or persistent.

Possible causes

Eye strain or dryness
Infection or allergy
Minor injury
Eye pressure changes
Systemic conditions affecting vision

When to see a doctor

Seek urgent care if symptoms are severe, rapidly worsening, or come with trouble breathing, severe chest pain, confusion, or heavy bleeding. Otherwise, talk with a clinician if they last several days or interfere with daily activities.