Why Can I Sense When Someone Is Behind Me?

Human eyes are different from those of other animals in this regard. Our pupils and irises are darker from the white part of the eyeball known as the sclera, and this contrast is why you can tell when someone's looking at you or simply looking past you.

What does it mean when you feel someone behind you?

Someone is there; at your side, or just behind you. A feeling of a person or agency, without being heard or seen. It is a felt presence, one of the most unusual experiences a person can have, and yet also a feeling that will be familiar to many.

What does it mean when you feel like someone is behind you but no one is there?

Feeling of Presence, or FoP, is the disconcerting notion that someone else is hovering nearby, walking alongside you or even touching you. It's the stuff of ghost stories, but also a real symptom of several neurologic conditions, including schizophrenia and Alzheimer's disease.