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  1. #1
    Join Date
    Mar. 24, 2009
    Posts
    669

    Default I Have an Odd Question

    When you're laying in bed at night, in a dark room, your eyes closed, and you cough pretty hard - what causes the bright white lights to happen behind your eyeballs? kind of like little lightening flashes.

    I've just always wondered, maybe someone here knows.



  2. #2
    Join Date
    Oct. 9, 2007
    Location
    Central NJ
    Posts
    1,037

    Default

    Aliens.


    5 members found this post helpful.

  3. #3
    Join Date
    May. 6, 2004
    Location
    Charlotte
    Posts
    1,518

    Default

    Zombies.
    "Life is too short to be a slave to the whims of others." -- RugBug, COTH


    1 members found this post helpful.

  4. #4
    Join Date
    Aug. 12, 2002
    Location
    Calera, AL
    Posts
    1,901

    Default

    I don't know but I have a "floater" (vitreous gel) that cropped up just before this year's eye doc. appt. The first thing she asked me is if I ever had light flashes in the eye and/or showers or multiple floaters. I was to let her know ASAP if that happened because it could be bad. Please see the attached link and see an eye doctor:

    http://www.allaboutvision.com/condit...potsfloats.htm



  5. #5
    Join Date
    Mar. 24, 2009
    Posts
    669

    Default

    It only happens when I cough - has for many yrs and both eyes do the same thing. Interesting I will do some research from this idea. thx It always helps to pick some brains here. Tons of life experience on this board!

    and you other two aren't too far off either


    1 members found this post helpful.

  6. #6
    Join Date
    Nov. 8, 2005
    Location
    NC
    Posts
    2,231

    Default

    If I knew what I were doing, why would I take lessons?

    "Things should be as simple as possible,
    but no simpler." - Einstein


    1 members found this post helpful.

  7. #7
    Join Date
    Mar. 24, 2009
    Posts
    669

    Default

    Quote Originally Posted by Adamantane View Post
    ding ding! Oh yeah they told me my children wouldn't be normal too!


    1 members found this post helpful.

  8. #8
    Join Date
    Dec. 19, 2008
    Location
    Where The Snow Flies
    Posts
    2,296

    Default

    They're called phosphenes and they're caused by the action of your cough causing you to momentarily cause your eyelids to shut tightly. Completely normal. It's the same thing that happens if you close your eyes and press on your eyelids - the funky lights you see then. The pressure on your retina from closing your eyelids tightly (and possibly from the cough itself) tricks your visual cortex into thinking you're seeing light when you aren't.


    3 members found this post helpful.

  9. #9
    Join Date
    Mar. 24, 2009
    Posts
    669

    Default

    See smart people on Coth. Thanks!! what a quick answer, now we all know some trivia.


    2 members found this post helpful.

  10. #10
    Join Date
    Nov. 8, 2005
    Location
    NC
    Posts
    2,231

    Default

    Who told you that?

    Perhaps they won't be -- who ever can say about these things? -- but not because of this
    If I knew what I were doing, why would I take lessons?

    "Things should be as simple as possible,
    but no simpler." - Einstein



  11. #11
    Join Date
    Jun. 16, 2011
    Posts
    779

    Default

    As long as it is when you are having pressure on your eyes not a problem. If it starts to happen when your eyes are open then you need to see a doctor, it could be your retina.

    I kept having them but my cornea doctor thought it was normal until I told him my students asked me what I was looking at all the time and I told them it was the faries.

    He looked a little more and immediately sent me to the retina doctor who lasered the tear back together that day.



  12. #12
    Join Date
    Jul. 19, 2007
    Location
    Michigan
    Posts
    10,303

    Default

    Quote Originally Posted by alabama View Post
    I don't know but I have a "floater" (vitreous gel) that cropped up just before this year's eye doc. appt. The first thing she asked me is if I ever had light flashes in the eye and/or showers or multiple floaters. I was to let her know ASAP if that happened because it could be bad. Please see the attached link and see an eye doctor:

    http://www.allaboutvision.com/condit...potsfloats.htm
    Multiple floaters can be from having hit your head at some point in your life. And they can be really annoying. (Or they can be age-related. I'm not that old yet.)

    Aura migraines are very much NOT fun, though they're not so much flashes as..wobbly halos? It's hard to describe.



  13. #13
    Join Date
    Aug. 12, 2002
    Location
    Calera, AL
    Posts
    1,901

    Default

    Mine's just a (singular) floater. I'm, however, within the normal age range for one. I did hit my head really hard this past summer, though. The floater didn't show up 'til Nov.

    I go to my local medical school's professors' eye practice so I'm being seen by the actual instructors/doctors, not the students. My Dr. did see the floater, gave me info to watch for and deemed it benign.

    What mine looks like is a gnat right in front of my eye. And yes, REALLY annoying/distracting but otherwise just inconvenient.



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