The Iraqi Army (read "the U.S. Army") is registering all of their soldiers using a portable iris scanner which reduces the complexity of the retina eye into a 512-byte code. The system, called the Biometric Automated Toolset, has a false acceptance rate of 1 in 1.2 million and can enroll users without an attached PC.

This system has also been used to identify prisoners and insurgency suspects.

Retina scanning Iraqi recruits [MurdocOnline]