👉 A metroscope is a device used for magnifying small objects or items by using light. It consists of a lens that has a very low focal length, such as 1mm or less, and an object that can be focused on it with a light source. The goal is to create a virtual image of the object in front of the lens, which is then magnified by the lens. The term "metroscope" comes from the Latin word for meters (m) and scope (scope