Look up. Now down. Back up here again? Imagine having to do that every time you wanted to unlock your phone, as this granted Google patent for "Unlocking a screen using eye tracking information" possibly suggests. Okay, it actually looks more like it's intended for the firm's super spectacles -- which given their general hands-free nature -- makes more sense. The claims are fairly straightforward, unlocking of a device would be granted based on "determining that a path associated with the eye movement substantially matches a path of the moving object". As long as those moving objects aren't moving too fast, we think we can work with that.