A Drug-Ladened Microparticle (image) Johns Hopkins Medicine Caption This is a diagram of a microparticle that slowly releases a drug for treating "wet" age-related macular degeneration. The drug (blue) is encapsulated in hundreds of nanoparticles (green), which are then encapsulated in a microparticle (brown). Credit Jordan Green Usage Restrictions None 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.