An iris scan is a biometric identification method that uses the unique patterns in the colored part of the eye, known as the iris. Each person's iris has distinct features, making it an effective way to verify identity. The scan is typically performed using a camera that captures a high-resolution image of the iris. Iris scans are often used in security systems, such as at airports or secure facilities, to enhance safety and streamline access. This technology is considered more accurate than other biometric methods, like fingerprints, due to the complexity and uniqueness of iris patterns.