Layering of eye technology for better performance

Computer scientist sees new possibilities for ocular biometrics (Phys.org)

[Oleg Komogortsev and a team at Texas State University] are developing a three-layered, multi-biometric approach that tracks the movement of the eye globe and its muscles, and monitors how and where a person's brain focuses visual attention, in addition to scanning patterns in the iris. The iris is the colored part of the eye.

Eye movements as biometric identifiers?

For Your Eyes Only (TechnologyReview.com)

The way you view the world is unique, so why not use it to identify you?

A company in Israel has developed a security system that does just this--exploiting a person's unique pattern of eye movements to identify them. Most biometric security systems measure physical features that are constant, such as fingerprints or iris patterns. An eye-tracking system has the potential to be harder to fool and easier use, its creators say.

My first thought was to compare this to using a handwritten signature as a biometric. The biometric consists of the unique way in which someone moves a part of their body.

This would seem to be analogous to handwriting analysis because the way the system induces a subject's eye movements (by visually tracking a moving icon) isn't the same in each verification, the way your signature is meant to be (approximately) the same each time you sign something.