In the world of biometrics, retinal and iris scanning are otherwise referred to as ocular-based identification technology. In other words, this is relying on the unique physiological characteristics of the eye in identifying a person. Despite the fact that they’re sharing part of the eyes for the purpose of identification, such biometric modalities are different to how it functions.
Human retina is basically a thin tissue that consists of neural cells situated in posterior part of the eyes.
Each retina of a person is unique because of the capillaries’ complex structure that supplies blood to the retina.
How it Works?
The network of blood vessels in retina is complex that even a pair of twin has unique set of its own. Despite the fact that retinal patterns could be modified in cases of glaucoma, diabetes or retinal degenerative disorder, retinal usually remains unchanged from the day of the person’s birth up to their demise.
Biometric identifier called as retinal scan is being used for mapping unique patterns of the retina. The blood vessels in the retina are absorbing light more than the surrounding tissues and these are identified easily with ample lighting. Retinal scan is done by casting unperceived beam of low energy infrared light to the person’s eye by looking through the eyepiece of the scanner.