Derealization: 'The World Feels Fake'

Where depersonalization targets the self, derealization targets the external world — producing a persistent or recurrent sense that surroundings are unreal, dreamlike, foggy, or visually distorted.

• Core experience: the world appears two-dimensional, as if behind glass, artificially lit, or as if inside a simulation — familiar places feel strange, colors seem muted or oversaturated

• Derealization almost always co-occurs with depersonalization (hence the combined DSM-5 diagnosis DPDR); isolated derealization without any depersonalization is rare

• Neurologically: altered visual cortex processing and disrupted predictive processing (the brain's model of the external world) are implicated — the brain stops 'believing' its own sensory predictions

• Transient derealization occurs in up to 74% of the general population at some point — most commonly during extreme fatigue, panic, or substance use — and is clinically insignificant in isolation

• The distress in DPDR often comes not from the experience itself but from the fear of what it means — many sufferers catastrophize that they are 'going mad,' which perpetuates anxiety and sustains the symptoms

"It's like living inside a dream you can't wake up from — except you know it's not a dream, which somehow makes it worse."

- Patient description of chronic derealization, commonly reported in clinical literature