Do you have a photic sneeze reflex? In other words, when you go outside and bright sunlight hits your eyes, do you sneeze? Studies have shown it's an autosomal dominant condition that is present to varying degrees in about 25% of the population. I'm wondering if that figure holds up here. BTW, the condition has also been referred to as the ACHOO syndrome (Autosomal dominant Compelling Helio-Ophthalmic Outburst).