For more vulnerable settings, biometric solutions such as fingerprint readers, retinal eye scanners and hand geometry readers all offer a higher level of security. (qaeducation.co.uk)
It may also feature a fingerprint scanner or an integrated eye scanner and a quad HD (2,560 x 1,440) display. (bgr.com)
The Android phone features an eye scanner for enhanced security and privacy protection. (gadgetsin.com)