The same is true with person-to-person eye contact. Most of us are comfortable with eye contact lasting about three seconds, and prolonged mutual gaze without breaking can make us nervous. The amount of eye contact decreases, as we tend to look away from things that distress us and from people we don’t like. Similarly, a customer who is bored or restless may avoid eye contact by defocusing, gazing past you, or glancing around the room. (Disagreement shows up in compressed or pursed lips, clenched jaw muscles, or a head turned slightly away, so eye contact becomes sidelong.)

Source: Forbes April 11, 2018 21:00 UTC