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What is Anisocoria?

Description of the disease

Anisocoria is a condition in which the diameter of one eye's pupil differs from that of the other. This can be either a temporary or a permanent condition.


  • Physiological anisocoria (natural difference in pupil size in healthy individuals)
  • Pathological anisocoria (arises as a result of eye diseases or injuries)


The main symptom of anisocoria is uneven pupil size. Additional symptoms may include headaches, vision problems, and light sensitivity.


Causes of anisocoria can be diverse, including injury, infection, glaucoma, migraines, brain tumors, and other diseases.


Diagnosis of anisocoria involves an examination by an eye doctor, measuring pupil diameter, conducting tests on pupil reaction to light and darkness, as well as additional tests to identify possible causes.


Treatment of anisocoria depends on the cause. In some cases, surgical intervention may be required, while in other cases, medications are prescribed.


Prevention of anisocoria is about timely seeking medical attention when any changes in pupils or vision occur.


Diagnosis and treatment of anisocoria are carried out by an ophthalmologist or neurologist.

Note: This material is provided for informational purposes only and is not medical advice.