Vogt-Koyanagi-Harada syndrome is a rare disease of the eyes characterized by bilateral uveitis (inflammation of the uveal tract consisting of the iris, ciliary body, and choroid), alopecia (hair loss), poliosis (depigmented eyelashes, eyebrows, or hair), vitiligo (a skin disease with depigmentation), and hearing loss.

The exact cause of Vogt-Koyanagi-Harada syndrome is not known, but an immune response to a human leukocyte antigen (HLA) is suspected. Some researchers have found a genetic...