Learn in the textbookBiometric Authentication and Authentication Accuracy Metrics
DefinitionRetinal authentication (網膜認証) reads the pattern of blood vessels running across the retina at the back of the eye (the fundus) to confirm identity.
ExplanationRetinal vessel patterns vary greatly between people and sit where they cannot be seen from outside, which makes them hard to forge. Reading them requires looking into the device while it lights up the back of the eye, which takes more effort from the user.
AnalogyMuch like an eye doctor looking into the back of your eye, the device reads the map of vessels spread across it.
Memory hookThe retina is the thin layer at the back of the eye that plays the role of film in a camera, and this method reads the vessels running across it.