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Is Class 1 laser safe enough for baby eyes?

Started by Mr. Man-wai Chang July 31, 2018
I meant, what if someone accidentally shine Class 1 laser into a baby's 
eyes? Would it hurt retina and leave a permanent damage?

I know ... I know... it should NOT happen. Adults are supposed to be 
very very careful. :)

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On 7/31/2018 8:13 PM, Paul wrote:
> ... >     however, an unsafe power level may be collected by a >     magnifying optic with larger aperture." > > Looks like that baby is safe. Nothing to worry about.
There are counters with handheld laser scanner. And those handheld scanners are NOT placed carefully to avoid customers, at least I saw that in Hong Kong. Did they do it deliberately? Is it a secret laser experiment? Well... :) -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不賭錢! 不援交! 不打交! 不打劫! 不自殺! 不求神! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa
On Tuesday, July 31, 2018 at 6:22:00 AM UTC-4, Mr. Man-wai Chang wrote:
> I meant, what if someone accidentally shine Class 1 laser into a baby's > eyes? Would it hurt retina and leave a permanent damage? > > I know ... I know... it should NOT happen. Adults are supposed to be > very very careful. :) > > -- > @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! > / v \ Simplicity is Beauty! > /( _ )\ May the Force and farces be with you! > ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 > 不借貸! 不詐騙! 不賭錢! 不援交! 不打交! 不打劫! 不自殺! 不求神! 請考慮綜援 > (CSSA): > http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa
Knowing nothing, I assume so. Visible laser safety counts on the blink reflex, when the eye is exposed to strong light. (like the sun) I assume babies have this reflex... You could google it. George H.
On 7/31/2018 8:13 PM, Paul wrote:
> >     however, an unsafe power level may be collected by a >     magnifying optic with larger aperture."
So all we need is an "accident" to hurt some babies' eyes? Which will force them to see eye doctors and pay some treatment? Or maybe buying a few pair glasses? Oh well, I agree, it'll be good business. :) -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不賭錢! 不援交! 不打交! 不打劫! 不自殺! 不求神! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa
On 07/31/2018 09:03 AM, Mr. Man-wai Chang wrote:
> On 7/31/2018 8:13 PM, Paul wrote: >> ... >>      however, an unsafe power level may be collected by a >>      magnifying optic with larger aperture." >> >> Looks like that baby is safe. Nothing to worry about. > > There are counters with handheld laser scanner. And those handheld > scanners are NOT placed carefully to avoid customers, at least I saw > that in Hong Kong. > > Did they do it deliberately? Is it a secret laser experiment? Well... :) >
That beam is moving so fast that the dwell time on the retina is really, really short--probably tens of microseconds. That helps a lot. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
On 7/31/2018 10:09 PM, Phil Hobbs wrote:
> > That beam is moving so fast that the dwell time on the retina is really, > really short--probably tens of microseconds.  That helps a lot.
And you are not wearing those handheld laser scanners like a VR glass/helmet ...oh well... Um.... Is there safety classification for VR glasses/helmets? :) -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不賭錢! 不援交! 不打交! 不打劫! 不自殺! 不求神! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa
On 7/31/2018 10:40 PM, Paul wrote:
> > ******* > > And what treatment is there for a retinal burn ? > I don't think there is any treatment, except for the > doctor to say he can't help you.
Stem cells? :) Would retina of some very old persons be more vulnerable to Class 1 laser burn? OK, I know Class 1 is supposed to 100% safe. But ... you know there may be exceptions. :) -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不賭錢! 不援交! 不打交! 不打劫! 不自殺! 不求神! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa
On Tue, 31 Jul 2018 06:05:52 -0700, George Herold wrote:

> Knowing nothing, I assume so. Visible laser safety counts on the blink > reflex, when the eye is exposed to strong light. (like the sun) > I assume babies have this reflex... You could google it.
But you don't have to get *that* powerful before the blink reflex won't save your sight any more. I've got some 2.5W violet lasers here that will blind someone *instantly* and cause permanent scarring on the retina. Mind you, these are about 500x more powerful than the average laser pointer. -- This message may be freely reproduced without limit or charge only via the Usenet protocol. Reproduction in whole or part through other protocols, whether for profit or not, is conditional upon a charge of GBP10.00 per reproduction. Publication in this manner via non-Usenet protocols constitutes acceptance of this condition.
On Tuesday, July 31, 2018 at 1:00:50 PM UTC-4, Cursitor Doom wrote:
> On Tue, 31 Jul 2018 06:05:52 -0700, George Herold wrote: > > > Knowing nothing, I assume so. Visible laser safety counts on the blink > > reflex, when the eye is exposed to strong light. (like the sun) > > I assume babies have this reflex... You could google it. > > But you don't have to get *that* powerful before the blink reflex won't > save your sight any more. I've got some 2.5W violet lasers here that will > blind someone *instantly* and cause permanent scarring on the retina. > Mind you, these are about 500x more powerful than the average laser > pointer. >
I think class 1 is less than 1mW in the visible. We sell a class 3B laser.. it's in the NIR... no blink reflex. (I always encourage people to buy extra laser goggles.) George H.
> > > > > -- > This message may be freely reproduced without limit or charge only via > the Usenet protocol. Reproduction in whole or part through other > protocols, whether for profit or not, is conditional upon a charge of > GBP10.00 per reproduction. Publication in this manner via non-Usenet > protocols constitutes acceptance of this condition.
On 8/1/2018 1:25 AM, pfjw@aol.com wrote:
>> >> And you are not wearing those handheld laser scanners like a VR >> glass/helmet ...oh well... Um.... >>
>
> http://www.lasersafetyfacts.com/resources/Spreadsheet---laser-classes.pdf > > Some useful information on laser classes.
Thanks
> And, yes, there are safety standards for VR glasses. > > https://www.fi.edu/virtual-reality/product-safety-information
Thanks. -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不賭錢! 不援交! 不打交! 不打劫! 不自殺! 不求神! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa