#field_of_view__field  the area that is visible (as through an optical instrument)
  supertype:  #visual_percept__visual_image  a percept that arises from the eyes; an image in the visual system
  subtype:  #microscopic_field__microscopicfield  the areas that is visible through a microscope
  subtype:  #operative_field__operativefield  the area that is open during surgery

No statement uses or specializes #field_of_view; click here to add one.