Retina Scanners......are they good for you ?

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Offline neilep

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Retina Scanners......are they good for you ?
« on: 23/10/2007 16:39:08 »
Dear Ocular Implant Specialists,

This is a retina scanner:

[attachment=1341]

Pretty nifty piece of equipment eh ?

I understand these things scan your eye with a laser !...over prolonged use are these things safe ?...can they damage the eyes ?.....are there others that use differing technologies, different sources of light ?



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Offline Nobody's Confidant

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Retina Scanners......are they good for you ?
« Reply #1 on: 23/10/2007 17:40:59 »
http://en.wikipedia.org/wiki/Retinal_scan

Does this help? it talks about retina scanners. They may cause cataracts and glaucoma apparently...
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Offline Bored chemist

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Retina Scanners......are they good for you ?
« Reply #2 on: 23/10/2007 19:08:36 »
"They may cause cataracts and glaucoma apparently"
Says who?
My guess is that they are "safe" (as far as anything ever is).
How useful they are is another question.
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Offline techmind

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Retina Scanners......are they good for you ?
« Reply #3 on: 23/10/2007 21:17:43 »
http://en.wikipedia.org/wiki/Retinal_scan

Does this help? it talks about retina scanners. They may cause cataracts and glaucoma apparently...

No, under the subheading "Disadvantages" (of the technology), the page says
"Vulnerability to diseases such as cataracts and glaucoma"

My interpretation is that this is merely stating that the reliability of the retina scanning and identifying technology itself worsens or becomes unusable if the subject is suffering from cataracts or glaucoma.
In the case of cataracts, the lens of the eye goes foggy and opaque (it crystallises) which is fairly obviously going to make imaging anything (like the retina) through it tricky...
"It has been said that the primary function of schools is to impart enough facts to make children stop asking questions. Some, with whom the schools do not succeed, become scientists." - Schmidt-Nielsen "Memoirs of a curious scientist"

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lyner

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Retina Scanners......are they good for you ?
« Reply #4 on: 24/10/2007 12:32:50 »
Optical equipment is so sensitive that you would only need very low levels of light.  Harmless-  except for the risk of conjunctivitis if you touch it.

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Offline Nobody's Confidant

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Retina Scanners......are they good for you ?
« Reply #5 on: 24/10/2007 17:23:28 »
Yes! Everyone uses my link!
Nothing is absolute. It takes a thousand people to make a stereotype, only one to grind it into the dust.