Eyelock Myris is a USB add-on that secures your computer with eye scanning technology, via engadget:

When it comes to unique passcodes, it doesn’t get much more secure that an eye scan. Thanks to EyeLock’s Myris, you’ll be able to create super complex passwords that you won’t have to remember — using a USB-powered add-on to authenticate your identity instead. Myris is about the size of a makeup compact and is cloaked in a blue cloth exterior. On the backside, there’s the camera that’s lined with a light ring, changing color to indicate where you are in the scanning process. It starts light blue, then changes to dark blue at the start before finally showing green when it’s complete. Once connected to the aforementioned port on your laptop or PC, the device takes a scan of your eyes to set up its defenses with the help of a companion app. That capture takes about 15 seconds while moving the camera toward the eyes from arm’s length and then backing it away. In the process, Myris snaps a whole library of images before converting them to a video-based template unique to up to five users. The software allows the setup of those insane passwords and manages profiles in order to complete the configuration.

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