Apparatus, systems and methods for facilitating iris-scanning contact lenses and/or biometric identification employing iris scanning contact lenses are provided. In one implementation, the contact lens can include: a transparent substrate formed to cover at least a portion of an iris of an eye; and a circuit. The circuit can include: one or more light sensors disposed on or within the transparent substrate and that detects light filtered through the iris and incident on the one or more light sensors; readout circuitry, operably coupled to the one or more light sensors, that outputs information indicative of the light filtered through the iris and incident on the one or more light sensors; and a power component that supplies power to the readout circuitry. In various implementations, the contact lens can be employed in systems and/or methods associated with authentication and identification.