Study Participant (IMAGE) NIH/National Eye Institute Caption Study participant has darker hair after 6 months on nitisinone (right), compared to baseline (left). Credit Brian Brooks, M.D., Ph.D., National Eye Institute Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.