Windows to the Soul?
Scans of the retina can verify a person’s identity, and they’re so accurate the government use of retina scans for security areas is becoming more the norm than not.
According to Truth It, scans are completed in two stages. There is the initial scan and an authentication scan.
Another website, Medical Discoveries, talks of initial scans: “The scanner measures this (retina) reflection at 320 points along the beam path. It then assigns an intensity grade between zero and 4,095." Once the results are compressed, the initial scan is placed in a database.
Truth It says that “initial scans take a minimum of five scans and last approximately 45 seconds; subsequent authentication scans are faster and take only 10-15 seconds."
According to some experts, however, iris scans may be the choice for the future because they are just as accurate and less intrusive.