Diagnosis: Achoo!

As everyone probably knows I like to find out about people's quirks and then harrass them relentlessly. I don't know Uncle Bill very well so I am not comfortable enough to harrass him but am hoping to someday reach that level. Uncle Bill has a quirk where when he goes outside without sunglasses on and it is bright outside(basically Florida 362 days a year) he sneezes. I am proud to say I was reading a magazine that had a medical explanation for this phenomenon so I am diagnosing him. (My fee will be collected in mango margaritas and lobster at his house someday) Here is the info:
ACHOO syndrome is a generally benign condition characterized by sudden, uncontrollable sneezing after viewing a bright light.
Description
The ACHOO syndrome, standing for autosomal dominant compelling heliopthalmic outburst syndrome, is an inherited condition where a person will involuntarily sneeze after seeing a bright light. A person with this condition will sneeze multiple times, and in rare cases may sneeze 30-40 times. The syndrome is usually more intense if the person with the condition moves suddenly from darkness into an area with bright lights or sunlight.
http://www.medterms.com/script/main/art.asp?articlekey=11491

For all of you wondering how I know this about Uncle Bill-I remember all your little quirks! Dan Shaw-I will try to diagnose you next!