Illusion refers to distortion of one’s senses. Illusions are no way near reality; they distort reality, but are experienced and shared by several people. We can experience several kinds of illusions, but optical illusions are the extremely well understood and experienced. The term “illusion” refers to some type of sensory distortion and indicates the misinterpretation of a true sensation.
On the other hand, “hallucination” refers to distortion in the absence of a stimulus.
To quote Cyril Connolly, “in order to be happy we must select the illusion which appeals to our temperament and embrace it with passion” Mimes refer to a repertoire of illusions created by physical means. Mime artists create an illusion of acting or being acted upon by physical means.