Chiang, Oliver (2011-02-09). „The Master of Online Mayhem“. Forbes. Nuoroda tikrinta 2011-02-13. „The founder of videogame seller Valve suffers from Fuchs Dystrophy, a congenital disease that slowly destroys the cornea. "I have dead-people eyes", he said at the time. Double cornea transplants in 2006 and 2007 cured him and changed him utterly.“