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Thread: laser blindness

  1. #1
    Enlightened
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    Default laser blindness

    Anyone have a link to documented evidence of someone actually being permanently blinded by a laser?
    Optoronics PPL-120, 165mw greenie / Modded PGL-III, 236+mw big red

  2. #2
    Flashaholic
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    Default Re: laser blindness

    What exactly is it you are looking for? Reports of permanant eye damage from laser accidents?

    http://jrm.phys.ksu.edu/Safety/DOE_L...ort-Mar-05.pdf
    http://www.nat.vu.nl/~laser/SAFETY_eyes.ppt
    http://www.rli.com/resources/incident-refs.asp


    Extensive documentation of permanant eye damage from laser accidents is available from any academic library and probably from any public library with knowledgable interlibrary loan librarians. See the third source above for a list of possible sources for 1960-1995.

    Jim

  3. #3
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    Default Re: laser blindness

    Thanks for the info Jim. I couldn't get the second link to work? I was looking for a report of permanent laser blindness because I have read lots of warnings but never really seen on tv or heard in the news of someone actually being blinded by a laser. Also I don't want anybody to get the wrong idea, I wont be taking any chances...PB
    Optoronics PPL-120, 165mw greenie / Modded PGL-III, 236+mw big red

  4. #4
    Flashaholic
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    Default Re: laser blindness

    Second link is a powerpoint file (slides). Microsoft has a free powerpoint viewer here, or you can use the OpenOffice presentation tool to open it on a variety of platforms.

    If what you're looking for is evidence of total blindness, I'm sure it's out there but it may be hard to come by. Functional blindness can occur with damage to the lens, or damage to the fovea (the high-resolution center of vision). Most permanant laser damage is burns to the retina that, while they reduce the visual field, may not cause full blindness.

    Any permanant damage to the retina is bad. If you're lucky, it will be in your peripheral vision somewhere less important, but even then--it may make it difficult to see approaching vehicles while driving or it may be a constant irritation.

    Consider that I've used a pot-modded Leadlight, focused through a lens, to burn black electrical tape, and that somewhat higher power Leadlights will burn tape or pop black balloons without any additional lenses. Now, focus that through your eye lens, down to a tiny dot on your retina, and let your eye do its normal slight jittering. What smokes tape will 'smoke' your retina instantly.

    Jim

  5. #5

    Default Re: laser blindness

    I just scringed at that one story in your link about the student looking directly down the laser tube of an operating class 4 IR laser, cause she/he thought it was off. OUCH!

  6. #6
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    Default Re: laser blindness

    Quote Originally Posted by ks_physicist
    Second link is a powerpoint file (slides). Microsoft has a free powerpoint viewer here.

    Jim
    Thanks for the link Jim. I went through the whole slide show. Whoo, I think thats exactly the info I needed to 'scare' me into buying a pair of laser glasses. Thanks alot ...PB
    Optoronics PPL-120, 165mw greenie / Modded PGL-III, 236+mw big red

  7. #7

    Default Re: laser blindness

    Hi,

    Actually a sticky full of these nightmare threads might not be a bad idea. Call it 101 reasons to get goggles. To many are spending 500+ on a laser, but are to cheap to spend 50 bucks for a pair of goggles off ebay. Maybe learning the price of such carelessness will convince some of the need.

    Have a good one.
    Shawndoe

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