Understanding the Photic Sneeze Reflex

The video discusses the photic sneeze reflex, a phenomenon where some people sneeze when exposed to bright light. It explains that this reflex might be due to crossed signals between the eyes and nose. Scientists are investigating whether this reflex is genetic. The reflex is harmless, but those affected might want to use sunglasses when exposed to sudden bright light.

What is the photic sneeze reflex?

• A reflex causing sneezing when smelling flowers

• A reflex causing sneezing when eating spicy food

• A reflex causing sneezing when exposed to bright light

• A reflex causing sneezing when hearing loud noises

What is one theory about the cause of the photic sneeze reflex?

• Crossed signals between the eyes and nose

• Allergic reaction to sunlight

• Increased blood flow to the brain

• Dehydration from bright light

What are scientists currently investigating about the photic sneeze reflex?

• If it is contagious

• If it can be cured

• If it is genetic

• If it is harmful

What is the good news about the photic sneeze reflex?

• It improves vision

• It is entirely harmless

• It enhances smell

• It can be easily cured

What practical advice is given for those with the photic sneeze reflex?

• Stay indoors during the day

• Take allergy medication

• Wear sunglasses when going through tunnels

• Avoid bright lights completely