Why Do People Sneeze When They’re Exposed to Bright Light?

Sneezing when you see bright light is called a photic sneeze. When someone sees something very bright, like the sun or a flash of light, their eyes send a signal to their brain. The brain then tells the nose to sneeze! It's like your body has a special alarm that goes off when it gets too bright.

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Examples

  1. A child runs out from a dark room into the bright sun, and sneezes right away.
  2. Someone wearing sunglasses takes them off in a bright place, like outside on a sunny day, and immediately sneezes.
  3. A person sees a bright flash of light from a camera’s flash, and then sneezes.

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