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2. Retinal scan - Wikipedia

   en.wikipedia.org/wiki/Retinal_scan

   A retinal scan is performed by casting an unperceived beam of low-energy infrared light into a person’s eye as they look through the scanner's eyepiece. This beam of light traces a standardized path on the retina. Because retinal blood vessels absorb light more readily than the surrounding tissue, the amount of reflection varies during the scan.

3. Scanning laser ophthalmoscopy - Wikipedia

   en.wikipedia.org/wiki/Scanning_laser_ophthalmoscopy

   Scanning laser ophthalmoscopy developed as a method to view a distinct layer of the living eye at the microscopic level. The use of confocal methods to diminish extra light by focusing detected light through a small pinhole made possible the imaging of individual layers of the retina with greater distinction than ever before. [4]

4. Iris recognition - Wikipedia

   en.wikipedia.org/wiki/Iris_recognition

   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 ...

5. Ophthalmoscopy - Wikipedia

   en.wikipedia.org/wiki/Ophthalmoscopy

   Observing the eye's interior required alignment of the observer's vision and the light source. This was discovered by William Cumming, a young ophthalmologist at the Royal London Ophthalmic Hospital , who wrote that "every eye could be made luminous if the axis from a source of illumination directed towards a person's eye and the line of vision ...

6. Retinal birefringence scanning - Wikipedia

   en.wikipedia.org/wiki/Retinal_birefringence_scanning

   Retinal birefringence scanning (RBS) is a method for detecting the central fixation of the eye. The method can be used in pediatric ophthalmology for screening purposes. By simultaneously measuring the central fixation of both eyes, small- and large-angle strabismus can be detected.

7. Worldcoin, Sam Altman’s eye-scanning crypto project ... - AOL

   www.aol.com/finance/worldcoin-sam-altman-eye...

   Worldcoin, Sam Altman’s eye-scanning crypto project, announces its own blockchain. Niamh Rowe. ... As a reward for the scan, users have been airdropped Worldcoin tokens, which are currently ...