A hand lens is a small, portable magnifying glass that helps people see tiny details up close. It usually has a round shape and is held in one hand, making it easy to use for examining objects like leaves, insects, or even small text. Hand lenses are commonly used in fields like biology, geology, and education to enhance observation skills. These lenses come in various magnifications, allowing users to choose the level of detail they want to see. They are often made of glass or plastic and can be found in many sizes. A hand lens is a valuable tool for anyone curious about the world around them.