And I’ll add a little more about it.
Derealization is the absence of real images and sensations, the illusion (imaginary perception) that surrounding objects, people or events are unreal or not in the present. This is a psychopathological symptom in which the world around us is perceived as unreal and distorted. Problems with memory, counting, thoughts and actions become incomprehensible to the person himself, and thoughts are confused. The perception of colors and sounds, shapes and sizes of objects is impaired. It may appear in adulthood or develop after mental disorders. Problems occur in 3-19% of patients. Derealization quickly disappears, but in other people it persists for a long time. This is individual and depends on many factors. All symptoms peak and then subside. Depression worsens the course of the disease. May be a symptom of schizophrenia or