Urine and blood tests can usually only detect substances consumed in the past two to three days. A new technique, devised by Iritech in San Jose, CA, screens for longer-term drug use-up to two weeks-by looking at eye response. A person looks into a binocular-like camera and is exposed to a flash of light. Software calculates how quickly the pupils shrink and recover, compares this response against pupil records stored in a database, and gauges within seconds whether the subject has taken drugs or alcohol during the past several weeks.
Iritech CEO Daniel Daehoon Kim says the test would be best suited as a screening tool for prisons or for employers evaluating job applicants. One possible drawback: some legitimate medications, such as antiseizure drugs, affect pupil response and could cause false positives. The technology is 95 percent accurate, based on clinical studies involving more than 12,000 subjects. The company hopes to give the system its first real-world test this year at a prison in Santa Clara, CA.
How Facebook and Google fund global misinformation
The tech giants are paying millions of dollars to the operators of clickbait pages, bankrolling the deterioration of information ecosystems around the world.
DeepMind says it will release the structure of every protein known to science
The company has already used its protein-folding AI, AlphaFold, to generate structures for the human proteome, as well as yeast, fruit flies, mice, and more.
Inside the machine that saved Moore’s Law
The Dutch firm ASML spent $9 billion and 17 years developing a way to keep making denser computer chips.
This is what happens when you see the face of someone you love
The moment we recognize someone, a lot happens all at once. We aren’t aware of any of it.
Get the latest updates from
MIT Technology Review
Discover special offers, top stories, upcoming events, and more.