Eye Ball's

Discussion in 'Off-Topic' started by loosewire, Jul 9, 2009.

  1. loosewire

    Thread Starter AAC Fanatic!

    Apr 25, 2008
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    Why are our Eye Balls spared Insect bites and other pimple like
    bumps.What protects the surface of the eye ball. Don't say eye lids.
    We encounter many Insects that can be In the hundreds,than could
    get by the eye lids.
     
  2. Ratch

    New Member

    Mar 20, 2007
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    loosewire,

     
  3. Wendy

    Moderator

    Mar 24, 2008
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    I'd never wondered that, until you said it. Dagnabit!
     
  4. Dave

    Retired Moderator

    Nov 17, 2003
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    Must be a characteristic of the sclera. Perhaps the fact it is so thin precludes its ability to swell to anything substantial like a pimple.

    Dave
     
  5. StayatHomeElectronics

    Well-Known Member

    Sep 25, 2008
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    And occasionally they do get past the eyelid. Not pleasant!
     
  6. Mass

    Member

    Apr 9, 2009
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    The cornea doesn't have any blood vessels - perhaps that has something to do with it.
     
  7. steveb

    Senior Member

    Jul 3, 2008
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    Why exclude one of the best answers? Why do we use lenscovers on cameras? :)

    First of all, the eyes can be hurt. It is possible for an insect to bite you in the eye. I know someone who was bit by a spider while she slept. Also, many animals will go for your eyes if they are fighting for their life: cats, birds or prey, rodents etc. Also, do you think your eyes would be spared if an entire wasps nest attacked you?

    Basically, the eyes are so critical for survival that there are various protection schemes in place. Eye lids, reflexive aversion, instincts all help. The fact that we can see and feel anything near our eyes allows us to protect ourselves.

    Pimples on the eyes are probably rare because getting one would make complications too easy. A pimple on the skin is a protective measure. If contamination is in a skin pore, then the pimple is helping in fighting that. However, if the same thing happened in the eyes, the eyelids wouldn't close correctly, and this would be counterproductive. There are other mechanisms to keep the eye clean and fight off contamination. This gets back those eyelids again. The constant washing with tears and blinking is very effective.

    I agree with Ratch that this is not the best place to ask the question, but since you asked in an electronics forum, I don't feel guilty about speculating.
     
  8. Dave

    Retired Moderator

    Nov 17, 2003
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    That's a good point. Occam's Razor anyone?

    Dave
     
  9. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    Has anyone looked up what a pimple is?

    The conjunctiva (+cornea, sclera) does not have sebaceous glands. It is somewhat like asking why don't you have to shave your eyeballs.

    John
     
  10. Dave

    Retired Moderator

    Nov 17, 2003
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    :D

    I think for the uneducated, of which I am one, a pimple constitutes any locally-raised structure on the the surface of a part of the body.

    Factually speaking, John, you are correct of course.

    Dave
     
  11. Wendy

    Moderator

    Mar 24, 2008
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    I liked the blood vessels idea. I wonder if the eyeball is cooler than the surrounding skin, or smells bad (or is not right in some other way) to a blood sucker. I suspect gelatin doesn't offer much in the way of nutrition. I was reading an article on MSN that says mosquito's find body odor offensive just like everyone one else. If it weren't for girls maybe we'd have them licked...
     
  12. Mark44

    Well-Known Member

    Nov 26, 2007
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    I just got back Monday night from a five-day backpacking trip in Olympics Nat'l Park. The weather was quite warm, as much as 85 F one day, and not much cooler than that on the other days. Since my hiking buddy and I covered almost 50 miles in that time, and went from about 500 ft to 5000 ft and back down again, we got pretty sweaty. I washed off a couple of times (without soap -- didn't take any), so we probably got plenty ripe during our trip.

    We encountered lots of mosquitoes (and at least three kinds of flies), especially in the mornings and evenings, but I don't think I got a single bite. There might be something to Bill's point about mosquitoes being repelled to some extent by BO. In contrast, they seem to be drawn to perfumes and scents, and I've read that some vitamins tend to make you less delectable to them.
     
  13. Dave

    Retired Moderator

    Nov 17, 2003
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    Got a link, Bill?

    Dave
     
  14. beenthere

    Retired Moderator

    Apr 20, 2004
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    Get a check on that from any grunt who spent time in country during the Viet Nam war.

    It sure doesn't bother them in Florida.
     
  15. HarveyH42

    Active Member

    Jul 22, 2007
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    Your tears contain salt, which isn't very bacteria friendly, so no pimples. You blink automatically, most flying insects don't go into your mouth either, they don't want to be trapped. Doesn't apply to motorcyclist though, best reason to wear a helmet...
     
  16. loosewire

    Thread Starter AAC Fanatic!

    Apr 25, 2008
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    How did the spider the bite eye ball when a sleep,must have bitten eyelid.
    If I had used another word beside's pimple would have been better off.
    But you get the general point I'm trying to make about the surface
    of the eye,but If you think about It most of us have encountered metal
    specks In our eye's from grinding.What about a boil with pus. Why Is John
    alway's right ? Is he a learned Man.
     
  17. Wendy

    Moderator

    Mar 24, 2008
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    Apparently not. Every try to find an article 5 days after you read it on the MSN home page? :rolleyes: I spent an hour or so looking. Did you know there is a site called the wayback machine, that will show you the front page of MSN 6 years ago on a specific date? It's called the wayback machine, but it's cutoff is 6 months. A front page has to be 6 months old before the link shows.

    I believe it was the July 4th page on MSN, but that doesn't seem to help none.
     
  18. Dave

    Retired Moderator

    Nov 17, 2003
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    Thanks for trying, anyway.

    Dave
     
  19. Wendy

    Moderator

    Mar 24, 2008
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    I'll get back with you in under 6 months.
     
  20. Dave

    Retired Moderator

    Nov 17, 2003
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    Your card is marked for 10th January 2010 16.53PM (GMT) ;)

    Dave
     
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