UrgentEmergency
Anisocoria / Unequal Pupils
A difference in pupil size; new changes with symptoms can be urgent.
What is it?
Anisocoria is a difference in size between the two pupils. It can be a normal variation in some people, but new or significant anisocoria — especially with other symptoms — needs professional assessment.
Common symptoms
- Unequal pupil sizes
- May be painless or associated with other symptoms depending on cause
Risk factors
- Consult an eye specialist to understand your personal risk factors.
Prevention tips
- Have comprehensive and regular eye examinations
- Maintain a healthy lifestyle with a balanced diet, regular exercise, and no smoking
- Wear UV-protective sunglasses outdoors
- Seek urgent medical care for any sudden change in vision
Treatment overview
Treatment varies depending on the specific condition and its severity. An ophthalmologist will recommend the most appropriate management plan after a full assessment.
Seek urgent care if you notice
- Sudden vision loss
- Severe eye pain
- New flashes, many new floaters, or curtain-like shadow
Related eye care tips
Have questions about your eyes?
This information is general education and does not replace a professional eye examination. If you are worried about your eyes, book an appointment.