An Iris Scanner is a biometric device that identifies individuals by analyzing the unique patterns in their iris, the colored part of the eye. This technology captures a high-resolution image of the iris and converts it into a digital template, which can then be compared against stored templates for identification or verification purposes. Iris scanning is considered highly secure because the patterns in the iris are complex and stable over a person's lifetime. It is used in various applications, including security systems, mobile devices, and border control, providing a reliable method for confirming identity without physical contact.