A Magnifier is a laboratory instrument used to magnify and view small objects or details that are difficult to see with the naked eye. It consists of a convex lens or a set of lenses mounted in a frame, which is usually held close to the object to be viewed. The magnifier enlarges the object, making it appear larger and easier to see.

Magnifiers are commonly used in a wide range of scientific applications, such as in biology, geology, and metallurgy, as well as in industrial and manufacturing settings for quality control and inspection purposes. They are also used in many everyday applications, such as reading small print or examining small objects. Magnifiers come in a variety of sizes and shapes, ranging from handheld magnifying glasses to sophisticated electronic microscopes.