Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Safety & Legal Issues



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 03-26-2012, 02:27 AM #1
Junior Member
 
Join Date: Mar 2012
Posts: 1
Rep Power: 0
Love2Fly is on a distinguished road
Love2Fly Love2Fly is offline
Junior Member
 
Join Date: Mar 2012
Posts: 1
Rep Power: 0
Love2Fly is on a distinguished road
Default Must a beam go into the eye to cause Retinal Damage?

Hello, all

First time poster here who values that a board like this can be found on the net. So naturally I have a question(s) about laser safety and hope that someone more knowledgeable about these matters could answer it.

Recently my roommate (who is a douche and downright always immature) has bought a 5 mW green laser and has not shown to date any responsibility with it. He has been waving it around when he plays with it, on a few occasions coming very close to shining the beam into my eyes.

Now, from I understand about this matter, even a 5 mW can cause retinal damage, right? For one, I am utterly terrified of having any damage done to my eyes because I want to be a pilot and this would cause a huge setback to my career to have any retinal damage.

So here comes my question. How much of the beam must go into the eye before damage can occur? If the beam is shined--say, 4 feet away onto a point near to a person, and someone glanced over at the emitting source, would this cause any damage? Also to boot, would starring at the point source of the beam in a darkened room do anything to someone's vision?

I'm asking this because this is what happened to me the earlier tonight and the beam was so bright, it left an afterimage in my vision, which got me worrying. I apologize for coming across as paranoid, but I fear that this immature douche could hurt me or someone else, and that would...make me have to kick his ass. Lasers aren't a toy IHMO.


Love2Fly is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 03-26-2012, 02:45 AM #2
Sigurthr's Avatar
Class 3B Laser
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 873
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Sigurthr Sigurthr is offline
Class 3B Laser
Sigurthr's Avatar
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 873
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Default Re: Must a beam go into the eye to cause Retinal Damage?

If it is actually 5mW you're fine, I wouldn't worry about eye damage. 5mW green is the level where you blink before it does real damage. Anything more than that and there will be eye damage before you can blink (literally). Most cheap 5mW pens are actually much more than 5mW though. Some are as high as 90mW.

But, no, the beam entering the eye isn't neccessary for eye damage at high enough powers. Above a couple hundred mW and at close enough distances the reflected diffuse light from a wall can cause permanent damage.
__________________
Amateur Multispectral Photographer - [X-Ray, UV, Vis, IR]
Amateur Electrical Engineer
Autodidact
Tesla Coil Expert

Last edited by Sigurthr; 03-26-2012 at 02:46 AM.
Sigurthr is offline   Reply With Quote
Old 03-26-2012, 03:06 AM #3
InfinitusEquitas's Avatar
Class 4 Laser
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,004
Rep Power: 10341
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
InfinitusEquitas InfinitusEquitas is offline
Class 4 Laser
InfinitusEquitas's Avatar
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,004
Rep Power: 10341
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
Default Re: Must a beam go into the eye to cause Retinal Damage?

Did the afterimage go away after a few seconds to a minute? If yes you have nothing to worry about.

Quote:
So here comes my question. How much of the beam must go into the eye before damage can occur?
Direct hit from a 5mW beam, where you don't blink... there is a chance of damage. The chance is even higher if the laser is more powerful than 5mW.

Quote:
If the beam is shined--say, 4 feet away onto a point near to a person, and someone glanced over at the emitting source, would this cause any damage?
No it wouldn't.

Quote:
Also to boot, would starring at the point source of the beam in a darkened room do anything to someone's vision?
No.

When dealing with lasers what you have to really worry about are direct hits, and specular reflections off of surfaces like mirrors, glass, basically anything shiny. Reflections of off matte surfaces, or diffuse reflections, are not as dangerous, but can be at high powers.
InfinitusEquitas is offline   Reply With Quote
Old 03-26-2012, 03:35 AM #4
Class 2 Laser
 
Join Date: Mar 2011
Posts: 472
Rep Power: 147
TheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond repute
TheReddish TheReddish is offline
Class 2 Laser
 
Join Date: Mar 2011
Posts: 472
Rep Power: 147
TheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond reputeTheReddish has a reputation beyond repute
Default Re: Must a beam go into the eye to cause Retinal Damage?

I would tell him to stop or break that fools laser off in his arse. My eyes are too bad to be much of a pilot, I have tried, I love to fly, but my laser surgery left me with a uv issue and strong light halos, and before that I was near sighted.


If your eyes are good don't let some dick wreck them with a laser pointer of "unknown" power level.

If you must buy some laser glasses to protect yourself.

If he has an LPM and it tests less than 5mw its NP, my fleabay laser I just got for 10$ is 78mw of green and about 12mw of IR, I can burn a trash bag with it, but it looks safe, its not, if I can burn a trash bag I can burn a capillary in my retina.

You can not assume to know if a laser can hurt you, unless you KNOW what it is putting out, I bet your friend lack an LPM

ALSO I wear goggles never been hit in the eye with laser, and yet, in the last year, I have a crap ton of floaters and my eyes seem to take forever to get my rods going at night. I use allot of 1-2W lasers though :P good luck with the pilot thing, its loads of awesome, I still may become a pilot though, just not a commercial one, as a kid I wanted to be a bush pilot in AK.

Last edited by TheReddish; 03-26-2012 at 03:44 AM.
TheReddish is offline   Reply With Quote
Old 03-26-2012, 04:10 AM #5
n2stuff's Avatar
Class 2M Laser
 
Join Date: Nov 2011
Location: Clovis Ca. USA
Posts: 804
Rep Power: 624
n2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond repute
n2stuff n2stuff is online now
Class 2M Laser
n2stuff's Avatar
 
Join Date: Nov 2011
Location: Clovis Ca. USA
Posts: 804
Rep Power: 624
n2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond reputen2stuff has a reputation beyond repute
Default Re: Must a beam go into the eye to cause Retinal Damage?

The above posts are right. Just because he or the laser says 5mw DOES NOT mean that it is. Be safe not sorry. Does your roomy drink? If he does wait till he passed out and drop the laser in half full beer or shove it up his a$$. Problem all gone unless he gets another.
__________________
Scott
n2stuff is online now   Reply With Quote
Old 03-26-2012, 04:10 AM #6
Banned
 
Join Date: Jan 2009
Location: In A State of Shock.
Posts: 11,871
Rep Power: 0
Tech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond repute
Tech_Junkie Tech_Junkie is offline
Banned
 
Join Date: Jan 2009
Location: In A State of Shock.
Posts: 11,871
Rep Power: 0
Tech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond repute
Default Re: Must a beam go into the eye to cause Retinal Damage?

When he is not around grab the laser and give it a few good whacks on something that's hard, but wont show physical damage. You could rap a leather belt around the top, and hit the table a couple of times.
Tech_Junkie is offline   Reply With Quote
Old 03-26-2012, 04:30 AM #7
InfinitusEquitas's Avatar
Class 4 Laser
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,004
Rep Power: 10341
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
InfinitusEquitas InfinitusEquitas is offline
Class 4 Laser
InfinitusEquitas's Avatar
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,004
Rep Power: 10341
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
Default Re: Must a beam go into the eye to cause Retinal Damage?

Or just put the batteries in the wrong way
InfinitusEquitas is offline   Reply With Quote
Old 03-26-2012, 12:02 PM #8
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,439
Rep Power: 18210
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,439
Rep Power: 18210
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Must a beam go into the eye to cause Retinal Damage?

5 mW or not, he just shouldnt mess around with it if you don't want him to - immature idiot i suppose?
Benm is online now   Reply With Quote
Old 03-27-2012, 04:28 PM #9
tsteele93's Avatar
Class 3R Laser
 
Join Date: Dec 2011
Location: South Cackalackey, USA
Posts: 2,065
Rep Power: 321
tsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond repute
tsteele93 tsteele93 is offline
Class 3R Laser
tsteele93's Avatar
 
Join Date: Dec 2011
Location: South Cackalackey, USA
Posts: 2,065
Rep Power: 321
tsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond reputetsteele93 has a reputation beyond repute
Default Re: Must a beam go into the eye to cause Retinal Damage?

Quote:
Originally Posted by InfinitusEquitas View Post
Or just put the batteries in the wrong way
I don't know if that would work, even the cheap Chinese 532's I have dealt with always seem to have polarity protection. And believe me I know, I'm notorious for putting batteries in backwards!
__________________
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Tom Steele

Why I'm Here

405nm tsteele93 12x build @ 545mW

445nm Survival Laser @ 1.25W - GIFTED
445nm Stainless Steel Monster with H140 diode @1.62A - 2.15W!
450nm rhd single mode @ 190mW

532nm O-like 50 mW pen from Cajun Lasers - small dot, tight beam!
532nm O-like Crown, rated @ 400mW, metered @ ~450mW with AW battery!
532nm O-like Crown rated @ 500mW, not yet tested
532nm RPL-165 @ 204mW
532nm RPL-375 @ 427mW

635nm rhd Lipstick Tube @ ~485+ mW
638nm Fat Boy @ 825mW - custom build

650nm Bolly BL-8006 @ 319mW

Laser Safety and Eye Injury
tsteele93 is offline   Reply With Quote
Old 03-28-2012, 02:24 AM #10
InfinitusEquitas's Avatar
Class 4 Laser
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,004
Rep Power: 10341
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
InfinitusEquitas InfinitusEquitas is offline
Class 4 Laser
InfinitusEquitas's Avatar
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,004
Rep Power: 10341
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
Default Re: Must a beam go into the eye to cause Retinal Damage?

Quote:
Originally Posted by tsteele93 View Post
I don't know if that would work, even the cheap Chinese 532's I have dealt with always seem to have polarity protection. And believe me I know, I'm notorious for putting batteries in backwards!
Must be my luck then... I killed two lasers by putting batteries in the wrong way
InfinitusEquitas is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 02:15 PM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC