The subject must focus on a pinpoint of little green light (to properly align the eye) and avoid blinking. The examiner is required to keep the subject's eye within half an inch of the instrument. Retinal scans require close contact of user and scanner, a perfect alignment of the eye with a scanner, and no movement of the eye. These vessels absorb light and can be easily visualized with proper illumination. Retinal scans are based on the presence of the fine network of capillaries supplying the retina with oxygen and nutrients. Currently a number of companies claiming that they perform retinal scanning, in reality are performing iris scans. However, it was not until 1994 when John Daugman developed the technology for iris scanning that is became useful, and since then iris scanning has begun to challenge the retinal scans. Two years after the first retinal scanner was developed in 1987, Leonard Flom and Aram Safir patented the use of the iris as a personal identifier. Retinal scans are just one of the biometric methods using the eye for personal identification. Although military and high-security use of photographic retinal scans began decades earlier, by 1985, retinal scan technology became available for computerized biometric identification and commercial security use. In the 1930s retinal capillary patterns were suggested to be unique, but the technology used to exploit this information was developed much later. The process relies on generating images of the retina using a low-intensity light source. The true target for the scan is the capillary pattern in the retina. The technology that scans the retina is known as retinal scanning. Thank you very much this was very helpful.The retina is the neural part of the eye responsible for vision and the pattern of blood vessels serving the retina is as unique as a fingerprint. user has to put their face next to the machine and focus on a retina scanner for 3 seconds slightly more expensive then basic fingerprint reader more accurate, (accuracy not effected by dirt on fingers, misplaced fingers, etc.) No two individuals or twins have same retina patterns. What are the advantages and disadvantages of hand geometry over finger print technology? anon65405 21 hours ago Identical twins are the closest to clones there is, and they still have different eye retina patterns and fingerprint patterns. It's making a younger version (though realistically it's the same age) of the animal.Įven if they did this on humans, fingerprints would still be different, so would eye retinas. Scientists like to claim they've created clones through genetic egg cell implants. So if a person develops diabetic or hypertensive retinopathy, would their blood vessels change so much that the retinal scan would not recognize the original retina? anon73226 March 26, 2010 Methuselah Foundation, the Singularity Institute for Artificial Intelligence, and the Lifeboat Foundation.Īnon229863 November 15, Yes there are such things as clones!Īnon159208 March 10, - tell dolly the sheep that there are no clones. Passionate about stem cell research, regenerative medicine, and life extension therapies. In addition to being an avid blogger, Michael is particularly Physics, biology, astronomy, chemistry, and futurism. Michael is a longtime AllTheScience contributor who specializes in topics relating to paleontology, Furthermore, it is probably the most accurate biometric available, far surpassing the fingerprint in both reliability and accuracy. The retinal scan retails for as low as $220, making it affordable to anyone wanting to maintain high levels of security. Traditionally used to block physical gateways, such as those guarding the cores of power plants or military installations, retinal scanning has been employed in recent times to safeguard critical computers and their data. The retina is the part of the eye that contains cells that detect light.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |