As the saying goes, what has been seen cannot be unseen.
It's a rule that applies to solar eclipses, Spiderman 3 and, perhaps most frighteningly, LCD monitor defects. So while you might be enamored with your fancy new flatscreen, there could be a score of problems lying in wait that you've yet to even notice.
Source:
http://www.tested.com/news/how-to-spot-5-common-defects-in-your-lcd-warning-cannot-unsee/584/
