Spc. Daniel Oladejo (right) and Spc. Peter Johnson,

Spc. Daniel Oladejo (right) and Spc. Peter Johnson, biomedical science technicians with the U.S. Army Institute of Surgical Research, make adjustments to the shock tube Feb. 24 at Fort Sam Houston, Texas. The shock tube is a piece of equipment designed to simulate exposure to explosions similar to what Soldiers may encounter while in combat. The data collected from the device is crucial to the ocular research directorate, which focuses on research and advances in medicine aimed at helping Soldiers suffering from ocular related conditions. (U.S. Army Photo by Sgt. Aaron Ellerman, 204th Public Affairs Detachment/Released)