An illusion is a perception that does not match reality, often tricking the senses. It can occur in various forms, such as visual illusions, where images appear differently than they are, or auditory illusions, where sounds are misinterpreted. Illusions can be created by factors like lighting, perspective, or context, leading to a distorted understanding of what is actually present. Illusions are commonly used in art and entertainment, such as in magic shows or optical illusions. They can also be found in nature, like mirages, where heat causes light to bend, creating the appearance of water. Understanding illusions helps us recognize the limitations of our perception.