A spyglass is an 8-letter term for a small handheld telescope. It is a type of optical device that is used to magnify distant objects, allowing the user to observe them in greater detail. Spyglasses are typically used for activities such as birdwatching, stargazing, and navigation. They are also sometimes used in military operations to observe enemy positions. Spyglasses are usually made of metal or plastic and feature a small lens at one end and an eyepiece at the other.