The arts refers to the theory and physical expression of creativity found in human cultures and societies. Major constituents of the arts include literature (including fiction, drama, poetry, and prose), performing arts (among them dance, music, and theatre), and visual arts (including drawing, painting, filmmaking, architecture, ceramics, sculpting, and photography).Some art forms combine a visual element with performance (e.g., cinematography) or artwork with the written word (e.g., comics). From prehistoric cave paintings to modern day films, art serves as a vessel for storytelling and conveying humankind's relationship with the environment.
The visual system is the part of the central nervous system which gives organisms the ability to process visual detail as sight, as well as enabling the formation of several non-image photo response functions. It detects and interprets information from visible light to build a representation of the surrounding environment. The visual system carries out a number of complex tasks, including the reception of light and the formation of monocular representations; the buildup of a nuclear binocular perception from a pair of two dimensional projections; the identification and categorization of visual objects; assessing distances to and between objects; and guiding body movements in relation to the objects seen. The psychological process of visual information is known as visual perception, a lack of which is called blindness. Non-image forming visual functions, independent of visual perception, include the pupillary light reflex (PLR) and circadian photoentrainment. This article mostly describes the visual system of mammals, humans in particular, although other "higher" animals have similar visual systems (see bird vision, vision in fish, mollusc eye, and reptile vision).