Claustrophobia, also called fear of space, belongs to the specific phobias. This means that the affected person feels a disproportionate fear in the face of a specific thing. Thus, people with claustrophobia develop strong feelings of fear in confined and closed spaces (for example, elevators, subways) as well as crowds (such as concerts). The counterpart of claustrophobia is agoraphobia, or claustrophobia of place, in which sufferers have a fear of open, wide places. Some experts have now moved to group both forms of anxiety under the umbrella term agoraphobia, as their common characteristic is the fear or avoidance of places and situations. The chip should help to overcome the fear of space.