"Why do we sneeze?" is a very common question but have you wondered why when you sneeze, your eyes will be closed? Well firstly it is because sneezing is a reflex action. Reflex actions are actions done by the body that we cannot control. Because sneezing is a reflex action thus closing our eyes is also another reflex action. Some people think that closing ones eye when sneezing is to prevent germs and bacteria from going into our eyes but it is not true. The actual reason for closing our eyes is because it is an act of our involuntary muscles or it may also be because our body does not want the water droplets released through sneezing to enter back into our body through our eyes. Some people can sneeze with their eyes open because they might remind themselves not to close their eyes when sneezing and with practice this can be acheived.
Resourses: http://www.letusfindout.com/why-cant-we-sneeze-with-our-eyes-open/