Why does sneezing come from looking at the sun?

If we try to look at the sun with our head held high, many of us will experience sneezing and runny nose. Thus, looking at the sun directly damages the eyes, so no one stares at the sun for a long time. But sneezing occurs even if we suddenly come to light out of complete darkness. Many people sneeze out of the dark theater after the film is over. Scientists call this action foric sneezes. When you look at a very bright light, your eyelids suddenly become smaller to control the light. The eyeball, like the lens of a camera, automatically enlarges for focusing. This action irritates the nerves in the nose and causes sneezing. The sudden rays of light on the face also irritate the nerves of the face. As a result, the mucous membranes of the inner skin of the nose are also stimulated to sneeze.