iPhone App Helps You Tell If You’re Sober Enough To Drive

iPhone App Helps You Tell If You’re Sober Enough To Drive

BreathalEyes uses the built-in camera to measure your blood alcohol levels by scanning eye movement.

Yi Chen
  • 9 january 2012

A new iOS app called BreathalEyes claims that it can accurately estimate your blood alcohol content (BAC) simply by scanning the movement of your eyes. The app analyzes your horizontal gaze nystagmus (HGN), something police officers often check in conjunction with the breathalyzer test. HGN is involuntary eye movement that is sometimes caused by alcohol consumption — when your eyes can’t move smoothly and often jerk or bounce when looking from left to right.

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