Inside binoculars are prisms which fold the light and shorten the instrument. The lenses magnify the image

Binoculars are a kind of tool that lets people see far-away things more clearly. The technology is called optics. Binoculars are made of a pair of matched telescopes which are held in front of the user's eyes.

The two telescopes of the pair have lenses that focus light and magnify the image. When someone looks through the binoculars at a far-away object, they can see details.