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LEDs for the Blind

boowax writes "Tired of being blinded by those annoying laser pointers that have found their way into all sorts of places for the convenience of corporate presenters? Looked too closely at the underside of your optical mouse? Are you just dumb enough to look directly into a laser? Well, fret no more, for here is a new technique for stimulating and healing those damaged retinal cells using LEDs. Its also being tested for use in treating similar problems caused by mucositis (a side effect of chemotherapy) and other eye related maladies."

30 comments

  1. Taco-snotting is dying by poopbot by Anonymous Coward · · Score: -1, Offtopic

    Netcraft has confirmed: Taco-snotting is dying.

    Yet another crippling bombshell hit the beleaguered Taco-snotting community when recently IDC confirmed that Taco-snotting accounts for less than a fraction of 1 percent of all homosexual acts. Coming on the heels of the latest Netcraft survey which plainly states that Taco-snotting has lost more fag practitioners, this news serves to reinforce what weve known all along. Taco-snotting faggots are collapsing in complete disarray, as further exemplified by failing dead last in the recent Faggot World comprehensive snotting test.

    You dont need to be a Katz to predict Taco-snottings future. The handwriting is on the wall: Taco-snotting faces a bleak future. In fact there wont be any future at all for Taco-snotting because Taco-snotting is dying. Things are looking very bad for Taco-snotting. As many of us are already aware, Taco-snotting continues to lose faggotshare. White ink flows like a river of bubbly, thick jizz. The circle-snot is the most endangered of them all, having lost 93% of its core snotters.

    Lets keep to the facts and look at the numbers.

    Circle-snotting leader Jeff Homos Masterbates states that there are 7000 snotters of the circle-snot. How many users of anal snot are there? Lets see. The number of circle-snotting versus anal snot posts on Usenet is roughly in ratio of 5 to 1. Therefore there are about 7000/5 = 1400 anal snot users. SnotOS posts on Usenet are about half of the volume of anal snot posts. Therefore there are about 700 users of SnotOS. A recent article put the circle-snot at about 80 percent of the Taco-snotting market. Therefore there are (7000+1400+700)*4 = 36400 circle-snot users. This is consistent with the number of circle-snot Usenet posts.

    Due to the troubles of CowboiKneels walnuts, abysmal sales and so on, the circle-snot went out of business and was taken over by SNOTi who sell another troubled Taco-snot. Now SNOTi is also dead, its corpse turned over to yet another gay whorehouse.

    All major surveys show that Taco-snotting has steadily declined in faggotshare. Taco-snotting is very sick and its long term survival prospects are very dim. If Taco-snotting is to survive at all it will be among heterosexual hobbyist dabblers. Taco-snotting continues to decay. Nothing short of a jizz-soaked miracle could save it at this point in time. For all practical purposes, Taco-snotting is dead.

    Fact: Taco-snotting is dead.

    - poopbot: information likes to be narrow

    1. Re:Taco-snotting is dying by poopbot by Anal+Cocks · · Score: -1

      "Netcraft has confirmed: Taco-snotting is dying. Yet another crippling bombshell hit the beleaguered Taco-snotting community when recently IDC confirmed that Taco-snotting accounts for less than a fraction of 1 percent of all homosexual acts. ..."

      That brings a tear to my eye, man. Thanks for keeping the spirit of WIPO alive. :~)

      --

      Hey, kid... wanna touch my "kernel patch"?

      -- Alan Cox

  2. Mouse??? by eggstasy · · Score: 1

    I always thought it was just a regular LED. Do optical mice like my Cordless Mouseman have actual lasers? The light spreads so much it does not definitely look like a laser, but i know nothing about hardware, so could anyone enlighten me on this?

    1. Re:Mouse??? by boowax · · Score: 1

      that bit about the mouse was a bit of a joke actually..i've had several people tell me that the box their optical mouse came in said it uses a laser. Yes, as far as I know, they're all LEDs, but that doesn't stop stupid people from seeing red and thinking its a laser.

      --

      You report, Slashdot decides
      Prevueing you're poast ownly hellps iff ewe no how two spel inn teh furst plase
    2. Re:Mouse??? by Anonymous Coward · · Score: 0

      they are LEDs. shine an LED on paper and look at the paper. shine a laser on the paper and look at the paper. they look different. it is not the color or the intensity...

  3. Hmm, I wonder. . . by The+Electric+Messiah · · Score: 1

    how many ./'ers are going to need to this IR LED treatment after checking their optical mouse to see whether it is in fact a laser. |-)

    --
    "Bold as Love"
  4. the greek in me by Horny+Smurf · · Score: -1, Troll

    Christ, I love Greek! Women just don't seem to understand that a
    man can find just as much pleasure in the warm confines of a well-
    muscled ass as they can in the satin embrace of a well-wetted
    cunt. Maybe we men have conditioned them too well to ignoring one
    hole for the other: nonetheless, every man I've talked to about it
    loves Greek and every woman who I've talked to about it has been
    less than enthusiastic. So imagine my surprise last weekend when
    Ophelia treated me to the joys of anal sex in what must be the
    first time in five or six years.

    The night started our strangely. Ophelia had just finished re-
    arranging her large library and was exhausted. As suits my
    biological clock, I was just coming awake at 10 PM when she was
    turning in. She invited me to bed and I politely declined: I was
    horny as usual and told her I'd keep her awake. After a couple of
    more requests from her, I stripped and crawled in beside her.
    Ophelia loves to snuggle and wasted no time in curling her small
    body up next to mine. I turned and kissed her. She was oddly
    responsive for her tired state, and teased me with a hint of
    tongue in her kisses. I reached down to feel her muff and found
    it just beginning to rev as her right hand slipped down her belly
    to her clit.

    I took up what has become my customary position between her legs -
    kneeling and using my cock as a sex toy to tickle her lower labia
    and the entrance to her cunt. But this time I let my aim wander
    lower to the wonderful curve where ass, crotch, and leg meet. I
    rubbed my cock against this soft crescent and expanded the stroke
    to brush against the entrance to her ass. I noticed that every
    time that my prick touched her rosebud, her strokes on her clit
    quickened. It wasn't long before I was pressing the tip of my
    cock against her asshole.

    Surprise! My cock slipped easily into her ass until the entire
    head was buried inside, and just as I was about to pull out and
    apoligize, she handed me a bottle of sex lubricant and said "What
    the fuck? Why not?". I pulled back and poured the lubricant on
    my hard cock and noticed her pussy was swollen and very wet. I
    worked my cock back into its previous nest. It was so easy. I
    could feel her ass muscles relaxing and opening for me. I eased
    ever so slowly deeper. Such heaven! Like a warm, wet hand
    gripping all around my prick - so much tighter than pussy, and
    delightful in an entirely different way. I could feel her hips
    grind against me as I worked the last of my seven-plus inches into
    her back door. Realizing where I was and how long it had been
    since I'd known this pleasure, I had to fight to pull the reigns
    in on my orgasm.

    It seemed like forever - my slow rocking pulling my cock almost
    full-length out of her ass before easing it back in until my balls
    rested against her firm buns. Her right hand furiously massaged
    her clit and her left hand played at the entrance of her cunt,
    pressing on the full length of her labia. And all the while my
    cock was enveloped in a firm net of gripping muscles that wrestled
    to bring the cum from me. "It's so weird," she said as she
    searched for the grip on her own orgasm. Suddenly, it was upon
    her. I felt her ass open up like a mouth that was just to blow up
    a ballon. "Are you close?" she hissed. "No," I grunted.
    She was close, tho'. Too close to stop. I felt her stiffen and
    lurch under me. "Uuhhhh! Come on you bastard! Fill my ass!" she
    yelled as she dug her nails into my back. Amazing what a little
    dirty talk will do - from that special nowhere where good men
    hide their orgasms until their lovers are ready, my load bolted
    from my crotch to my brain and back to my flushed balls. I
    gripped the pillow with my teeth and jerked my neck back and forth
    and tried not to deafen Ophelia when my cum blasted out of my cock
    like water from a firehose. The rush of jism racing up my tube
    seemed to last for stroke after stroke until sweaty Ophelia
    gasped, grunted, and pushed me from on top of her. Since I have
    a little anal experience myself, I knew the sudden discomfort of
    having something in your ass after you've orgasmed. I
    considerately slipped out of her despite not having finsihed my
    own orgasm to my complete satisfaction.

    I kissed her and thanked her for her special gift, but she pushed
    me away. "Go wash off and fuck my pussy," she said " I feel like
    something's undone." So after a quick and thourough shower, I
    returned to the futon where her dripping, swollen twat waited for
    my not-quite-recovered cock.

    And that's another story...

  5. Here ya go... by The_Guv'na · · Score: 2, Informative

    Laser diodes used in CD drives and whatnot are similar in principle, but the construction is somewhat different.

    Here's the construction of one by Sharp, and an explanation of how they work.

    Ali

  6. The future takes shape by acasto · · Score: 1

    I am glad to see things advancing to this. For too long we have been dependant solely on drugs, and even though they have done good, it has come with consequence. But I think as experience meets science in the world of treatments other than just mainstream drugs, things in the medical field will begin to advance substantially. We have such amazing resources at our disposal, but in medicine, one of the most amazing tools is our own bodies. Our healing mechanisms and our immune systems are not to reckon with. Once we learn how to stimulate and properly understand our own medical mechanism, we will have definitely come a long way.

  7. Do the blind know that... by Anonymous Coward · · Score: 0

    ...BSD is dying?

    Maybe LED's can tell them.

  8. !aa!aa!aadwd w dw wd w by Anonymous Coward · · Score: 0

    aaaaahuh hduw dh210[b 329bp 2t739pv dywegug dgyeu gduweg dyuwe gyduweg dywge dywegdehw bhejb hebwdejwgb ycevbycwue gyewulog ceig weliguiwleg yuowe guycolew cyegulo cgyeocguyie gcwiep gcyweicg eyouc geyoc gewyou gyioprh uihcew ihu hrvuivhrvh urehvuh veuvh rhvreuvh reuvrh e ehcwui chwei hcuiwe huicwe huicwe guiweoby9iulo qw9tv9vp c320[ f32ghgwecyg cewgyugce cewgu cew gyucew guywce gyu gewubhewbb tge dewji tgof it a the of and the why who how? The and the of and! feruihfire hreuhfiurfh reufh eruifheruihf uif

    1. Re:!aa!aa!aadwd w dw wd w by hplasm · · Score: 1
      Come on now, cough it up!!

      Does anyone know the Heimlich manoeuver?!?

      --
      ...and he grinned, like a fox eating shit out of a wire brush.
  9. Optical mice don't use lasers by Spunkee · · Score: 3, Informative

    All the optical mice I've seen don't use lasers. If they did, they'd be required by law to have the standard laser warning sticker in plain view on them. I have yet to see a mouse with such a sticker.

    They just use very bright LEDs. If you think about it, that's all that's really necessary. It just needs to illuminate the surface under the mouse with a color that the sensor is sensitive to.

    1. Re:Optical mice don't use lasers by Myco · · Score: 1

      Right, but nowhere does the blurb or the article say that optical mice use lasers. Which article did you read?

  10. It's easy to tell the lasers from the LEDs by Dr.+Ion · · Score: 2

    The light from a regular LED looks nothing like that from a Laser Diode. Even the cheapest laser pointer has wonderful "scintillation", where the lighted area appears to sparkle.

    This is caused by head and eye motion changing the light pathlength and interference patterns. It gives laser light a unique sparkle and shimmer that ordinary LEDs can only aspire to.

    So the LED on the optical mouse is clearly not a laser, just ordinary light for lighting up the mousepad. And the cheapest $2.99 laser pointer really is a laser.

  11. Eclipse by gCGBD · · Score: 1

    I wonder if this means I can now stare directly at an eclipse?

    I've always imagined that the experience would be the equivalent of 'staring into the face of god' or 'eating the apple in the garden of Eden'.

    If we can cure the eye damage, maybe I can start a cult and live happily ever after. :-)

    --

    O=='=++
    1. Re:Eclipse by Arjuna · · Score: 1

      You can stare directly at an eclipse, like I did when I was 5. Just make absolutely sure it is during totality, ie not a penumbral or annular eclipse.

  12. Don't you ever stop giving people ideas? by nmnilsson · · Score: 1

    Some people are always going to try the "don't try this at home" tricks.

    I remember having a physics lession; something about sound. Anyway, we had a couple of tuning forks.
    The teacher said: "Oh, by the way, don't put it to your teeth! That would make your enamel shatter".
    You can guess the rest.

    I, for one, don't want to give anyone any bad ideas. So forget you ever read this!

    --
    No sig to see here. Move along.
    1. Re:Don't you ever stop giving people ideas? by Rytsarsky · · Score: 1

      This was offtopic, so I'll go even farther off... I'm a violinist, and use a tuning fork to tune my instrument. The best way I've found, is to hold the fork between your teeth and let the sound resonate through your head. This way, you can hear it even with 50 other people tuning at the same time. It doesn't do anything to you teeth. Maybe other frequencies do, but 440Hz doesn't.

      --
      God became man to enable men to become sons of God. -C.S. Lewis
    2. Re:Don't you ever stop giving people ideas? by Morgoth_Bauglir · · Score: 1

      Tuning forks are a handy way to test for broken bones. Start the fork humming, then hold the handle against the bone where it is closest to the surface of the skin. If it's broken, the area of the break will hurt-- a lot.

      Or so I was told in EMT class. AlthoughI have seen this done by professionals; I don't know if it really works.

    3. Re:Don't you ever stop giving people ideas? by AJWM · · Score: 1

      Holding the handle of the tuning fork between your teeth is mostly harmless, and serves the purpose. What you don't want to do is touch the vibrating ends (tines?) of the fork to your teeth.

      Imagine a hammer beating on them 440 times a second...

      --
      -- Alastair
    4. Re:Don't you ever stop giving people ideas? by Rytsarsky · · Score: 1

      I've done that before, too. Not especially pleasent, but no real damage... I hope.

      --
      God became man to enable men to become sons of God. -C.S. Lewis
  13. Pointers and CDRom's by Anonymous Coward · · Score: 0

    Are laser pointers really laser pointers? How about CDRom's?
    Light Amplification by Standard Emission of Radiation... are we getting nuked when we use these? I doubt it.
    And where's the Ruby in my old broken CDRom drive?

    1. Re:Pointers and CDRom's by hplasm · · Score: 1

      Laser pointers ARE laser poiters, whilst CD_ROMs are NOT laser pointers, AFAICS |->

      --
      ...and he grinned, like a fox eating shit out of a wire brush.
  14. I was just wondering.... by Gabreal · · Score: 0

    What then does an optical mouse use? I assumed that the light at the bottom of a mouse was a laser that reflected the light off the mouse pad or desktop back up so that the mouse could be used in the same fasion as a sonar.... it made sence to me, could anyone tell me where I can read up on the science of the optical mouse?

    1. Re:I was just wondering.... by corey_lawson · · Score: 2, Informative

      the mouse detects optical surface defects ("noise"), and determines some sort of rate of noise change and direction to figure out where you're moving the mouse. Which is why they don't work on very smooth surfaces, like glass table or desktops.

  15. Optical Mice use LEDs, *NOT* Lasers. by BigBlockMopar · · Score: 4, Informative

    I always thought it was just a regular LED. Do optical mice like my Cordless Mouseman have actual lasers? The light spreads so much it does not definitely look like a laser, but i know nothing about hardware, so could anyone enlighten me on this?

    Well, like the filament of the rectifier tube in my 1939 Stewart-Warner radio, it hurts my eyes to stare into it, and it's red, but it's definitely not a laser.

    Lasers come in wavelengths (colors) ranging from invisible to invisible, and everything in between. For a variety of reasons, almost all the lasers you're likely to encounter will be red or IR (invisible).

    You can tell a laser from any other source of light very easily:

    • Is the light coherent? As in, if you shine the light at the house across the street, does the dot appear to be the same diameter as it was when you pointed it at your hand? Coherency is a basic feature of laser light; some spread is normal, but if it spreads like a flashlight, it's not coherent.

    • Speckle. Laser light almost always appears speckled. Regular light consists of an infinite number of wavelengths of light mixed to make white. Ranges can be filtered out with sheets of glass, plastic, etc - think of sunlight in a stained glass window, there may be 300 different wavelengths that we would describe as red light. But laser light is at a peak wavelength, with some slight impurities. But it's very precise. If all your light is at one wavelength, when it hits an imperfect (ie. any) surface, some light will reflect back 180 degrees out of phase and cancel itself out (like adding -1 and +1, they cancel to zero). This accentuates imperfections on the reflecting surface in the form of speckle.

    I don't see either one of these behaviors with the light from my own Mouseman. So, all I can assume is that it's merely a bright LED.

    LEDs are certainly bright enough: many cars use LED third brake lights, some new Cadillacs and Mercedes are using them as the main taillights, and I've seen traffic lights in Toronto (Eglinton East at Sloan) and Ottawa (Gladstone at some intersection between Preston and Bronson), so LEDs are certainly up to the task of lighting an image of my mousepad.

    --
    Fire and Meat. Yummy.
    1. Re:Optical Mice use LEDs, *NOT* Lasers. by John+Miles · · Score: 2

      Well, like the filament of the rectifier tube in my 1939 Stewart-Warner radio, it hurts my eyes to stare into it, and it's red, but it's definitely not a laser.

      WTF? Time to stop overclocking your 5Y3.

      --
      Dahlmann tightly grips the knife, which he may have no idea how to use, and steps out into the plain.
    2. Re:Optical Mice use LEDs, *NOT* Lasers. by BigBlockMopar · · Score: 2

      WTF? Time to stop overclocking your 5Y3.

      [grin] Wow! Tubes, here!

      Actually, it's a 35Z5; it turns out the cause was the output tube, a 50L6, had been replaced with a 25L6 sometime long ago. I plopped a 50L6 in the socket, and all the tubes are a lot happier.

      Nice, cheery glow...

      --
      Fire and Meat. Yummy.
  16. If 50 others are playing, use touch by pussyco · · Score: 1

    Put your tuning fork on the bridge of your violin. If the A-string is in tune it will resonate. Bring your little finger close, and as it touches, you not only get a loud buzz, but you can feel the string hitting your finger.