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2017-03-08 / admin

Why do we close our eyes when we sneeze?

We all know how a sneeze happens. What we don’t know is why our eyes automatically close when we do it. For someone with a cold, allergies, or just a tickle in the nose, it takes less than a second to eject about 5000 droplets of mucus from their nostrils at speeds of up to 100 mph. Those infectious snot particles can travel up to nearly 30 feet and remain suspended in the air for up to 10 minutes, creating a plume of biohazard air that threatens anyone in its path.

According to a theory, eyelids involuntarily shut during a sneeze to prevent the germs from entering and aggravating the eyes. Another theory suggests that muscle contractions induced by sneezing result in reflexive closing of the eyes. These muscle movements also cause some people to shed tears while sneezing.

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