Eye / Yeux

Several technologies related to eyes are proposed :

Retina vessels is the oldest: reading the retina blood vessels
Retina photon proposes to use the sensitivity of the retina to photon, which is not the same everywhere
Iris is the major technique: reading the structure of the iris
Eye vein is a recent proposal: reading the blood vessels on the eyeball, each side of the iris
Corneal surface topography reads the cornea surface to create a map
Eye movement tracking recognize your eye movement when following a target on a screen
Periocular biometric refers to the facial region in the immediate vicinity of the eye