It is impossible to sneez with your eyes open.

This is actually incorrect - it IS possible to sneeze with your eyes open. The sneeze reflex typically causes automatic eyelid closure, but some people can consciously override this or keep their eyes open during a sneeze. The myth that "your eyes would pop out" if you sneezed with them open is false - that's anatomically impossible. Eyelid closure during sneezing is a protective reflex, not a physical necessity. Many people have reported sneezing with eyes open, though it's uncommon and uncomfortable.