The other day I was out with my wife. After she had two margaritas, she wondered what her blood alcohol level was (don’t worry, she wasn’t driving).
If only I knew about this new iphone app. Here is a youtube video about “Breathaleyes” which claims to determine your BAC based upon your eye movements (“nystagmus”) using your iphone camera.
I am dubious about the use of nystagmus to determine intoxication, since there are over 120 documented causes for it. However, this may be a useful app to help you determine whether or not you should drive after having a couple of drinks.
Here is another video put up by the Breathaleyes people comparing their app to results from a breath alcohol test: