Eye exam device detects drivers under the influence of drugs

Human eye. Photo by Sarah Illes. CC-BY-SA 3.0

The portable device, that looks like a set of virtual reality glasses, can test for both drugs, including cannabis, LSD, cocaine and other drugs, as well as alcohol. It monitors and measures pupil’s response to light and moving objects. The behavior of eyes, and in particular pupils, changes after using those kinds of substances.

Source: A twist on automated eye exam technology could help take impaired drivers off the road