A condition in which each pupil is of different size. Simple aniscoria occurs in 20% of otherwise normal individuals and is not a problem. The pupils can vary by a size of 0.3 and 0.5 millimeters.

What causes it?

There are many possible causes of anisocoria, such as medications, Horner's Syndrome, Third Nerve Palsy, Adie Pupil, or damage to the iris.

How is it treated?

Treatment depends on what the cause of the problem was. In simple anisocoria, there is no treatment since it is merely a benign abnormality and not a problem. In the case of a disease or disorder, treatment of the cause will help correct the anisocoria.

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