What is the main advantage of retinal biometrics?

From Antispoofing Wiki

Human retina has unquestionable advantages in terms of anti-spoofing.

As suggested, retina recognition has a number of advantages that make it stand out in comparison to other modalities. First, it’s not as exposed as other biometric traits: fingerprints, face, iris, etc.

Retina is an innermost layer of light-sensitive tissue, which is located at the back of an eye near the optic nerve. Due to such anatomical structure, retina can’t be observed with a naked eye or captured with a regular camera.

Specialized equipment used for fundus photography is required to retrieve retinal images. At the same time, it makes the procedure lengthy, cumbersome and costly if compared to other biometric and anti-spofing modalities.

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