Lenticular lenses are specialized optical devices made up of a series of magnifying lenses arranged in a way that allows for the creation of images with depth and motion. They are commonly used in applications like 3D displays, where they can create the illusion of three-dimensional images without the need for special glasses. These lenses work by directing light in specific ways, allowing viewers to see different images from different angles. This technology is often found in products like postcards, advertising displays, and video games, enhancing visual experiences by providing dynamic and engaging imagery.