 proud to serve northeastern and central Pennsylvania. This is News Watch 16 at 4. Many people say the eyes are the window to the soul. Now another piece of cutting-edge equipment is testing that saying by using new technology that can tell if you're not being honest. Kim Kung shows us why eyes don't lie. Our eyes, they can show joy, sadness, anger. They can also show lies. Can you tell if a criminal is lying? What if you could identify a terrorist by looking him in the eye? Or maybe it's as simple as knowing if your spouse is lying. I can tell because there is a lag in response. Sherry and Scott Sprouse have 20 years of marriage under their belt, but they know the signs. She's a horrible liar. That is true. What about trained law enforcement officers? There are things people have said and that when they say it, as an investigator you're sitting across from them and immediately bells and whistles in my head go off this person's line. Unfortunately, that isn't always the case. Can we ever truly tell if a person is being honest or trying to be deceptive when they're going through an interview? We can't. But what if a cutting-edge technology can tell if you're lying by monitoring your eyes? It's called eye-detect and is the world's first non-intrusive lie-detection technology. In 30 minutes, it'll say whether or not you're being honest and it's 86 percent accurate. Here's how it works. You sit down in front of a computer loaded with the eye-detect software. Then a test administrator makes sure your eyes are lined up. You wrote down seven? Clearly. I'm a horrible liar. As you started to get closer to seven, your behavior likely changed because you were preparing to lie about the item that was going to be presented. The lie-detection test will continue. This eye tracker captures up to 16 measurements per second, including the slightest pupil dilation. It takes more mental effort to tell a lie than to tell the truth. And that increase in mental effort, even if it's slight, that slight increase in cognitive low has an involuntary effect on the eyes. So look into these eyes. Are they lying? Is there an underlying motive? There are hundreds of eye-detect tests, ranging from catching cheating spouses to identifying violating sex offenders. We have some countries, some governments that are using it to verify people who are coming into their country that are suspected of having ties to terrorism. Believe it or not, the U.S. government is almost the last of the parties, so I think it's time for them to step up to the plate. One thing that the president indicated was increased vetting immigrants from certain countries and refugees. This is a perfect tool for that. That's why eye-detect was developed. We saw this as an opportunity to use technology to make the world a safer, less corrupt, better place. All because the eyes don't lie.