why we closed our eyes when we thrust our nose's dust?
141049
Do you mean "why do we close our eyes when we <sneeze>?"?\n\nWhat a wonderful way to phrase that question :-)\n\nYou can find some answers at these sites:
468529
no its not possible to sneeze without closing ur eyes coz its a reflex action that happenes
232297
A sneeze is the fastest known action that a human can perform.  It is involuntary and can make the head mover VERY sharply.  Maybe our eyes close so that we don't get anything in them when our head jerks forward?  Dust, leaves, branches, etc. would be both painful and dangerous if they got into our eyes while we were moving our head at high speed.\n\nAccording to Wikipedea:\nIt is almost impossible for a person to keep their eyelids open during a sneeze, although some rare individuals report having little if any trouble doing so. The reflex of shutting the eyes serves no obvious purpose: the nerves serving the eyes and the nose are closely related, and stimuli to the one often trigger some response in the other.
288262
The reason why our noses get stuffy when we do cry is that when we cry, we \nmake more tears. While some of the tears run out of our eyes and down our \ncheeks, more of the tears run directly into our noses. This is because \nthere is a tear duct (or tube) called the nasolacrimal duct that runs from \nour eye sockets and drains into our noses. When we are not crying or \ntearing, the excess tears drains into our noses. However, it comes as a \nsort of slow drip, so it does not cause stuffiness or runny noses. \nInstead, is slowly runs into the back of your throat, and you swallow it. \nHowever, when crying and other things make you tear a lot (like onions and \nallergies), more tears come through this tube and into our noses than our \nnoses can handle. This makes our noses feel runny or stuffy.
441625
It's not so much that they're atached, but that the force of the pressure generated by blowing one's nose makes fluid escape the eyes.It's normal.
55234
I pinch my nostrils closed, with my mouth closed of course, and try to exhale through my nose. Not hard though, not like you're trying to blow your nose.
190467
Sneezing is actually a reflex action to a stimuli.The nerves send the message to the brain and then you sneeze. During sleep the reflex part of your brain rests too. The irritant still annoys the nerves but  no message is sent to the brain. However if the stimuli builds the irritant to  a level registered as pain the brain will wake you and you will sneeze (but to have this part of your brain working  you need to be awake!!)Scientific Fact! :)
313997
There are two possible reasons for tears to be released when you yawn. \nThe tears are secreted by the "lacrimal glands" located just inside the eye \nlids next to the nose. These glands secrete the fluid into the "lacrimal bag" \nwhere it is then released through the "lacrimal ducts" into the lining of the \neye lids to keep the eye moist.\n\nWhen you yawn it is possible that there is pressure put on the "lacrimal \nbag" and some fluid is forced out. \n\nThe secretion of the "lacrimal glands" is under control of the autonomic \nnervous system. This nervous system controls all the involuntary functions \nas contrasted to the somatic nervous system that controls all purposeful \nactions. When you reach out to catch a ball it is the somatic system that \nactivates the muscles to acheive that action. The autonomic system \ncontrols such things as the heart beat, sweating and the function of the \nintestines.\n\nWhen the autonomic portion of the nerves are activated the "lacrimal \ngland" secretes the tears which appear at the eye. These nerves also \ncause the pupil of the eye to constrict and get small as well as to cause\nthe glands in the nose to secrete. So, when you are crying you get tears,\na watery nose and your pupils should constrict. Perhaps the act of \nyawning causes activation of these nerves. Next time you yawn look in \nthe mirror and see it your pupils get small. But don't get too close to the \nmirror because when you look at things close to you the pupils get smaller \nanyway.
98543
Some people can sneeze with their eyes open and some people can’t. Sneezing is a reflex and so is closing our eyes. We have no control over whether or not we close our eyes when we sneeze. Some people don’t have reflex, so when they sneeze then their eyes won’t close. Some people try to close their eyes so when they sneeze their eyes won’t pop out. Your eyes don’t really pop out. People without the reflex to sneeze with their eyes open can try to train themselves to sneeze with their eyes open. One good way to do this is if when you sneeze you hold your eyes open.\n\n    People think that when you close your eyes when you sneeze that you are blocking germs and bacteria. That is not true because your eyes deal with germs all the time. If you close your eyes during a sneeze, then it is just a reflex. During this part of the sneeze, we tense some of our muscles. The tensing (tightening) of our muscles causes our eyes to shut.\n\n    People that sneeze a lot can prevent sneezing. If you feel a sneeze, then use saline solution. You can also softly hold your nose at the end. These things can help your body remove things it does not want without sneezing.\n\n    No one knows the reason you close your eyes when you sneeze. There are many possibilities. Some people think it is to protect your eyes from flying goop. Most doctors think that it is still a reflex, or we just can’t help it.\n\n    Sneezing is very good for you and your body because it removes things from your body like bacteria and germs. It also is good because it keeps the tubes that carry the air from your nose to the lungs healthy. Sneezing makes your nose clear when you have a cold. If you used to hate sneezing, then I hope this has changed your mind.
549674
I once heard that we breathe more into one nostril. So with each breath you take into your dominate nostril compared to the other it would have to be more lubricated giving you more"boogers"
913830
its possible that when you sneeze, your eyes close reflexively, to prevent your eyes from getting contaminated by whatever is coming out of your nose and mouth.  As well, the urge to sneeze (that tingling feeling in your nose) may play a part, due to the optic nerves for your eyes laying close to the nerves for your nose and recieveing some residual signal...
646005
same reason we close our eyes when we kiss. to get lost in the moment.
638924
It could Be that either:\n\n1) your eye has excreted waste (greeney/yellow crsuty substance sometines kown as 'sleep') and has excreted too much therefore glueing your eye shut.\n\n2) Your eyes atre beginning to weep becuase you have hayfever, if so buy some Antihistemine tablets and take 2 a day and that should keep it at bay
607058
we close our eyes to keep them safe from debree and germs eg when you sneeze you automatically close your eyes this is a message from your brain to your eyes telling them that you have sneezed so to keep them closed from germs when you blink it alsokeeps your eyes moisterised \n\ntry to keep your eyes open when you sneeze
611629
Thats very simple ,usualy when a big BANG ,a messege is  from your ears(due to the ample stimulus(change) in the surrounding) in a matter of micro the mesege is sent by sensory neuron cell to the Brain but because its to late to respond(like run away)the brain sends back a meesege via motor neurons to the effectors(your eyes)and we respond as a reflex action,you are not the one making the decision it your CNS(central neves system) and you close your eyes to protect yourself from danger like dust or ash or maybe it is just fear!
269615
i was told its because the eyes start to water, and this gets the sinuses moving\n\nheres a blog with a lil more info..quoted..\n\n"The sudden exposure to bright light sends a signal through the optic nerve fibers. These fibers run close to and into the same hub as the trigeminal nerve. The second division of the trigeminal nerve supplies sensory fibers to the nasal mucosa. The assumption is that nerve impulses in the optic nerve cause a sympathetic discharge in the trigeminal nerve fibers. which produces the sneezing."
747535
Wouldn't it be icky to have a runny nose in that case?  How would you see while you were blowing....that would pretty much make it impossible to blow while driving or walking wouldn't it?  EEEEEEk!  I don't even want to think of what a sneeze would do or how many extra germs you would get into your eyes...if you snored, would you snort your eyelids up and suffocate????  The logistical problems I can see from this are endless and very amusing!  LOL