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A prismatic is that linked to prism . This term (prism), meanwhile, refers to a body that is constituted with two flat polygons as bases and with a variable number of parallelograms as sides.

In the field of optics , a prism is a triangular shaped glass element that is used to generate the decomposition, refraction and reflection of light . This definition allows us to delve into the idea of ​​binoculars.

The binoculars are glasses which, inside, have prism tubes that allow the enlargement of images . These prismatic glasses , also known as binoculars twins , are used to observe objects that are great distance .

The binoculars have two tubes. In each of the tubes there is a prism and several lenses that allow to enlarge the image for each eye. Thus, the binoculars generate the stereoscopy (the feeling of depth or relief).

Because they allow you to look with both eyes simultaneously, the binoculars are binoculars . The user can focus the image in a simple way thanks to a small wheel.

The binoculars are classified according to the diameter of their objective and at the level of image enlargement. The binoculars of 10X60 , to cite a case, make it possible to enlarge the image ten times (10X ) and have an objective of 60 mm diameter. If the extension is of 20X or more, the binoculars must have a tripod or other support, since the natural movements of the hands cause the image to tremble.

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