They say the eyes are the window to the soul — and while that’s debatable, there’s no denying that they’re an excellent indicator of an individual’s recent chemical intake. Red-eyed with droopy lids? Looks like you’ve been hitting the bong. A wired, wide-eyed stare, however, could indicate that you’re hiding out in the bathroom with some rolled-up dollar bills. Decode your friends’ erratic behavior with tattoo artist Liam Sparkes‘s “Language of Eyes” chart, after the jump.