A Chinese businessman went blind after playing online games for four days straight, according to China Daily. The man went to a cyber cafe after a fight with his wife and played until he couldn't play (or see) anymore. Fortunately the blindness was only temporary, which means the man could either make up with his wife or go back for another marathon game session. Your guess is as good as ours.
The upshot of this story? We now know that spending too many hours playing FarmVille and other social games can, indeed, make you go blind. Hey, who turned out the lights?