Which biometric method uses unique patterns in the retina for verification?

Which biometric method uses unique patterns in the retina for verification?

• A. Finger printing
• B. Facial recognition
• C. Retina scanning
• D. Hand geometry

Answer: (C)

Retina scanning relies on the unique patterns of blood vessels at the back of the eye. This vascular pattern is highly individual and remains stable over time, making it an excellent basis for verification—comparing a live retinal image to a stored template in a one-to-one check. The process uses safe, low-intensity light to map these vessels, and while highly accurate, it’s more intrusive and costly than some other biometrics, which is why it’s used in high-security contexts rather than everyday applications. Other options examine surface traits like fingerprints, facial features, or the overall shape of the hand, none of which rely on the retina’s internal vascular patterns.

Retina scanning relies on the unique patterns of blood vessels at the back of the eye. This vascular pattern is highly individual and remains stable over time, making it an excellent basis for verification—comparing a live retinal image to a stored template in a one-to-one check. The process uses safe, low-intensity light to map these vessels, and while highly accurate, it’s more intrusive and costly than some other biometrics, which is why it’s used in high-security contexts rather than everyday applications. Other options examine surface traits like fingerprints, facial features, or the overall shape of the hand, none of which rely on the retina’s internal vascular patterns.