Choroideremia in male study participant (IMAGE) NIH/National Eye Institute Caption RPE cells (see circled examples) in a male participant with choroideremia, showing that enlarged RPE cells can be detected using Tam’s multimodal imaging approach. Credit Credit: Johnny Tam/The National Eye Institute. Usage Restrictions No restrictions. License Public Domain 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.