"Binoculars or field glasses are two telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes (binocular vision) ...
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when viewing distant objects. Most are sized to be held using both hands, although sizes vary widely from opera glasses to large pedestal mounted military models.
Unlike a (monocular) telescope, binoculars give users a three-dimensional (3D) image: for nearer objects the two views, presented to each of the viewer´s eyes from slightly different viewpoints, produce a merged view with an impression of depth." - (en.wikipedia.org 09.03.2020)