A monocular's a modified refracting telescope used to magnify the images of distant objects by passing light through a series of lenses and prisms; the use of prisms results in a lightweight telescope. Volume and weight are less than half those of binoculars, making it easy to carry. Monoculars, sometimes called telescopes when used in this capacity, are often used by visually impaired people to see distant objects that'd normally be undiscernable. For example, they're often used to read text o… (More on Monocular)