Which type of scan is used on the eye to measure the layer of blood vessels?

Question

Options

• AFacial recognition scan
• BRetinal scan
• CIris scan
• DSignature kinetics scan

• A
  8% (3)
• B
  71% (27)
• C
  5% (2)
• D
  16% (6)

Explanation

A retinal scan measures the unique pattern of blood vessels in the retina - the light-sensitive tissue at the back of the eye - making option B correct. This layer of blood vessels is so distinctive that it serves as a highly accurate biometric identifier.

Why the distractors are wrong:

• A (Facial recognition) maps external facial geometry, not internal eye structures.
• C (Iris scan) captures the colored ring around the pupil (the iris), which has a unique texture but is not a layer of blood vessels.
• D (Signature kinetics) analyzes the behavioral dynamics of how someone signs their name - unrelated to the eye entirely.

Memory tip: Think "Retina = veins behind the eye." The word retinal shares the root with the retina, which sits at the rear of the eye and is rich in blood vessels - unlike the iris, which is what you visibly see when you look at someone's eye color.

No community discussion yet for this question.