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A retinal scan is a biometric technique that uses unique patterns on a person's retina blood vessels. It is not to be confused with other ocular-based technologies: iris recognition , commonly called an "iris scan", and eye vein verification that uses scleral veins.
Iris recognition biometric systems apply mathematical pattern-recognition techniques to images of the irises of an individual's eyes.. Iris recognition is an automated method of biometric identification that uses mathematical pattern-recognition techniques on video images of one or both of the irises of an individual's eyes, whose complex patterns are unique, stable, and can be seen from some ...
Iris scanner in action to identify people. A biometric device is a security identification and authentication device. Such devices use automated methods of verifying or recognising the identity of a living person based on a physiological or behavioral characteristic. These characteristics include fingerprints, facial images, iris and voice ...
Aran Safir (March 29, 1926 – January 21, 2007) was an American ophthalmologist and inventor. He is known for inventing a groundbreaking iris recognition scanner. This technology has been widely adopted in the security sector, ranging from the U.S. Department of Homeland Security to Google. [1]
It is designed to expedite travel cross the US-Canada border and makes use of biometric authentication technology, specifically "iris recognition biometric technology". [6] It permits pre-approved members of the program to use self-serve kiosks at airports, reserved lanes at land crossings, or by phoning border officials when entering by water.
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Iridology (also known as iridodiagnosis [1] or iridiagnosis [2]) is an alternative medicine technique whose proponents claim that patterns, colors, and other characteristics of the iris can be examined to determine information about a patient's systemic health.
The iris is analogous to the diaphragm, and the pupil (which is the adjustable opening in the iris) the aperture. Refraction in the cornea causes the effective aperture (the entrance pupil in optics parlance) to differ slightly from the physical pupil diameter.