The experience of<unk>  can be described as an immaterial substance that separates a person from the outside world, such as a sensory fog, pane of glass, or veil. Individuals may report that what they see lacks vividness and emotional coloring. Emotional response to visual recognition of loved ones may be significantly reduced. Feelings of déjà vu or jamais vu are common. Familiar places may look alien, bizarre, and surreal. One may not even be sure whether what one perceives is in fact reality or not. The world as perceived by the individual may feel as if it were going through a dolly zoom effect. Such perceptual abnormalities may also extend to the senses of hearing, taste, and smell. The degree of familiarity one has with their surroundings is among one's sensory and psychological identity, memory foundation and history when experiencing a place. When persons are in a state of<unk> , they block this identifying foundation from recall. This "blocking effect" creates a discrepancy of correlation between one's perception of one's surroundings during a<unk>  episode, and what that same individual would perceive in the absence of a<unk>  episode. Frequently,<unk>  occurs in the context of constant worrying or "intrusive thoughts" that one finds hard to switch off. In such cases it can build unnoticed along with the underlying anxiety attached to these disturbing thoughts, and be recognized only in the aftermath of a realization of crisis, often a panic attack, subsequently seeming difficult or impossible to ignore. This type of anxiety can be crippling to the affected and may lead to avoidant behavior. Those who experience this phenomenon may feel concern over the cause of their<unk> . It is often difficult to accept that such a disturbing symptom is simply a result of anxiety, and the individual may often think that the cause must be something more serious. This can, in turn, cause more anxiety and worsen the<unk> .<unk>  also has been shown to interfere with the learning process, with cognitive impairments demonstrated in immediate recall and visuospatial deficits. This can be best understood as the individual feeling as if they see the events in third person; therefore they cannot properly process information, especially through the visual pathway. People experiencing<unk>  describe feeling as if they are viewing the world through a TV screen. This, along with co-morbidities such as depression and anxiety, and other similar feelings attendant to<unk> , can cause a sensation of alienation and isolation between the person suffering from<unk>  and others around them. as<unk>  Disorder is characteristically diagnosed and recognized sparsely in clinical settings. This is in light of general population prevalence being as high as 5%, skyrocketing to as high as 37% for traumatized individuals. Partial symptoms would also include depersonalization, a feeling of being an "observer"/having an "observational effect". As if existing as a separate entity on the planet, with everything happening, being experienced and alternately perceived through their own eyes (similar to a first person camera in a game, e.g. Television or Computer-Vision).
Derealization
Body substance isolation
Rejuvenation
Jactitation 
Depurination
Semantic satiation
Disinhibition
Marsupialization