Binoculars are optical devices that allow users to see distant objects more clearly. They consist of two telescopes mounted side by side, enabling the viewer to use both eyes for a three-dimensional image. Binoculars are commonly used for activities like birdwatching, hiking, and sports events. The magnification power of binoculars is usually expressed as two numbers, such as 8x42. The first number indicates how many times closer an object appears, while the second number refers to the diameter of the objective lens in millimeters. This design helps gather light, improving visibility in low-light conditions.