Uneven eyes can sometimes say a lot
Have you ever noticed that someone else's pupils, or your own, seem to be different sizes? This phenomenon is called anisocoria, and although it may seem alarming at first glance, it is not always a sign of a serious problem.
Anisocoria in a nutshell
Anisocoria refers to a difference in size between the two pupils (the black part in the center of the eye). In some people, this difference is natural and stable, with no effect on vision or health. In these cases, it is referred to as physiological anisocoria.
When should you be concerned?
If anisocoria is new, sudden, or accompanied by other symptoms, it may indicate an underlying health problem. Symptoms to watch for include:
- Blurred or double vision
- Eye or head pain
- Drooping eyelid (ptosis)
- Sensitivity to light
- Dizziness or nausea
In such cases, a consultation with your optometrist is necessary. Sudden anisocoria may be related to neurological conditions, head trauma, infections, or even exposure to certain substances or medications.
What are the possible causes?
The causes of anisocoria can vary. Here are a few:
- Physiological anisocoria (not serious, present in about 20% of the population)
- Horner's syndrome (neurological disorder affecting the nerves of the eye)
- Oculomotor nerve palsy
- Migraine with aura
- Head or eye trauma
- Acute angle-closure glaucoma
- Side effects of certain eye drops or medications
Diagnosis and treatment
An optometrist can assess the size of the pupils, their reaction to light, and perform tests to determine the cause of anisocoria. Treatment will depend on the cause. If it is benign, no treatment is required. If it is associated with a more serious problem, prompt intervention may be necessary.
Anisocoria is not always dangerous, but it deserves special attention when it is sudden or accompanied by symptoms. As with any change in your eyes or vision, the best thing to do is to consult an optometrist.
Have you noticed a difference in the size of your pupils? Don't wait. Make an appointment at one of our IRIS stores for a complete assessment of your eye health.
