A lenticular lens is a type of lens made up of a series of magnifying lenses arranged in a specific pattern. These lenses can create images that appear to change or move as the viewer's perspective shifts. They are commonly used in various applications, including 3D displays, advertising, and novelty items. Lenticular lenses work by refracting light in different directions, allowing multiple images to be viewed from different angles. This technology is often found in products like postcards, book covers, and video game graphics, enhancing visual experiences without the need for special glasses.