Brown eyes here. My wife makes fun of me because I look at lights/sun to sneeze. So I did some research to show her up.
The action of looking "up" starts to trigger the sneeze by opening the nasal passages for a more direct path. This will either start the ticking sensation prior to a sneeze, or if it's ready in action complete the sequence. I've gotten to the point where I can sneeze in a completely dark room looking up now. But still,
Nothing gets me like a nice sunny day lol.
Used to have hayfever but outgrew it.
"The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents... some day the piecing together of dissociated knowledge will open up such terrifying vistas of reality, and of our frightful position therein, that we shall either go mad from the revelation or flee from the light into the peace and safety of a new Dark Age."
-H.P. Lovecraft