 Police departments in our area are checking out a new technology today that's meant to make us all safer. As News 4's San Antonio's Darian Trotter shares with you, it's a lot of science and a little science fiction, all that determine if eyes lie. You were asked to choose a number between two and nine. In just a few minutes. And we'll ask you some general knowledge questions. Infrared lights are calibrated to a person's eyes and then the computer takes over. Drum roll. This is always the moment of truth. To see if he's lying or telling the truth. The computer said that you were deceptive on the number six. Please be the number six. There we go. The company Conversus is bringing a new type of lie detection to the world. It's called eye detect. So in that little five minute test, we took about 30,500 measurements of your left eye and 31,500 measurements of your right eye. The HDS at the University of Utah created it in the early 2000s, partially funded by your federal tax dollars. But how it's being used is what's new. We need to screen candidates to make sure that the officers that are out there to protect us have not committed crimes in their past that would disqualify them to be an officer of the law or a corrections officer. Six is not the number that I picked. Pardons and parole offices are also checking it out to use on criminals all based on pupil dilation. Eyes do dilate. That's one of the physiological reactions we do have when we're lying or scared or any other kind of emotions that affect the body. Patrick Ober with the American Polygraph Association says he's been evaluating it for about 18 months now. Which is it's somewhat less intrusive because we don't place components on a person's body. It simply looks at and looks at the pupils of the eyes. Darian Trotter, News 4, San Antonio.