Gazing for password entry

From engadget:

[Researchers at Stanford University are] testing some systems that track your eyeballs in a variety of ways to perform PIN input, and while the resulting study shows that input times are slowed a little, the system does indeed make "eavesdropping by a malicious observer largely impractical."

They call it EyePassword, and the main purpose touted in the article is to prevent 'shoulder surfing', where unwanted nearby observers could watch and steal your ATM PIN, or other passwords.

Ideally though, this could someday be used by the physically impaired for operating computers or other electronic devices.