###Human: What causes two different colors of eyelashes and hair? ###Assistant: Hello. This condition is called poliosis. This may be due to: 1. Wardenburg syndrome. 2. Tuberculosis. 3. Piebaldism, etc. 4. Thyroid problems. 5. Vogt-Koyanagi-Harada disease. Until examination and investigation are done, it is difficult to treat what is the cause. Usually treated with medical or laser therapy or hair transplantation. Take care.