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Closing your eyes while you sneeze is a reflex, and it is nearly (although not totally) impossible to keep them open while sneezing. There are many theories about why this reflex developed; some have been discredited while others have more support, but the bottom line is that no one is sure why we have this reflex.
The idea that closing the eyes during a sneeze is to protect the eye from microorganism ejected during a sneeze is probably not true, because a) if you are sneezing out a microorganism, it's already in your body so you don't need to be protected from that one, and b) sneezes are so forceful that the droplets ejected from a sneeze fly far from your own face; other people around you are the ones who need protection from your sneeze droplets, not you.
The most likely theory is that you close your eyes during a sneeze because the pressure of the eyelids against the cornea helps to protect the eyes from developing a subconjunctival hemorrhage, or a broken blood vessel on the surface of the eyeball. This theory is supported bythe fact that some very forceful sneezes do in fact cause such broken vessels; scientist think that they would happen more frequently if you didn't close your eyes while sneezing.
We close our eyes while sneezing to protect them. They say that it is not possible to sneeze by opening our eyes. We just happen to close our eyes when sneezing.
possible, but it hurts.
''It is unclear, but scientists theorize that we close our eyes to protect them. We may be protecting our eyes from microorganisms and particles from our sneezes,"
And it is impossible to open our eyes while sneezing
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