Genetic; no cure but: Having irises of 2 different colors is called heterochromia and occurs in about 1 in 150 people. The cause is usually genetic. Many famous people ranging from Alexander the Great to Mila Kunis have this. Many people think it is cool to have this unusual feature. There is no cure but one could wear a colored contact lens to hide it. See https://en.wikipedia.org/wiki/Heterochromia_iridum
Answered 5/12/2015
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