Visual field
Overview
The term visual field is sometimes used as a synonym
Synonym
Synonyms are different words with almost identical or similar meanings. Words that are synonyms are said to be synonymous, and the state of being a synonym is called synonymy. The word comes from Ancient Greek syn and onoma . The words car and automobile are synonyms...

 to field of view
Field of view
The field of view is the extent of the observable world that is seen at any given moment....

, though they do not designate the same thing. The visual field is the "spatial array of visual sensations available to observation in introspection
Introspection
Introspection is the self-observation and reporting of conscious inner thoughts, desires and sensations. It is a conscious and purposive process relying on thinking, reasoning, and examining one's own thoughts, feelings, and, in more spiritual cases, one's soul...

ist psychological experiments
", while 'field of view' "refers to the physical objects and light sources in the external world that impinge the retina
Retina
The vertebrate retina is a light-sensitive tissue lining the inner surface of the eye. The optics of the eye create an image of the visual world on the retina, which serves much the same function as the film in a camera. Light striking the retina initiates a cascade of chemical and electrical...

". In other words, field of view is everything that (at a given time) causes light to fall onto the retina.
 
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