Waardenburg syndrome is a very rare genetic condition occurring in 1 in 40,000 people. It’s named after a Dutch ophthalmologist, D. J. Waardenburg, who first identified the syndrome in 1951. The different-colored irises are among the common signs of Waardenburg syndrome, since it affects the pigmentation of hair, skin, and eyes. Other common symptoms are changes in vision and hearing loss. It's an auosomal disease characterized by varying degrees of deafness, minor defects in structures arising from the neural crest and pigmentation anomalies of the hair, the skin and/or the iris of both eyes.