Optical illusions are images that deceive our brains, making us see things differently than they actually are. They can trick our perception of size, color, and movement, leading us to interpret visual information in unexpected ways. These illusions occur because our brains rely on certain cues to understand what we see, which can sometimes lead to errors. There are various types of optical illusions, including geometric illusions, motion illusions, and color illusions. Each type plays with our visual perception, highlighting how our brains process images. Understanding these illusions can help us appreciate the complexities of human vision and the ways our minds interpret the world around us.