Eye with outer-blood retina barrier (IMAGE) NIH/National Eye Institute Caption The outer blood-retina barrier is the interface of the retina and the choroid, including Bruch's membrane and the choriocapillaris. Image credit: National Eye Institute. Credit National Eye Institute Usage Restrictions Please credit the National Eye Institute. License Original 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.