system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: When we need to sneeze, how does looking into the light help?
gpt
This only affects somewhere between 30 and 40 percent of the population. But essentially,  nerves connecting to your brain from your nasal area that can detect a tickle are crossed with your optic nerves. (I've heard the term crossed, can anyone confirm? ) so when you see bright light, your brain thinks it detects a tickle in your nasal passages. A sneeze can be induced to clear out the particle that your brain thinks caused the tickle sensation.