Spyglass

SPYGLASS. A spyglass is an optical instrument to make distant objects appear nearer through the process of light refraction through glass lenses. Often called a telescope in scientific terminology, or binoculars when paired for a clearer encompassing image, a spyglass is frequently employed at sea, where as a vital naval instrument it is used to sight distant land or ships. Also an essential for woodsmen, frontiersmen, trappers, and hunters, in ascertaining the lay of the land