Fun fact I have worn glasses since probably kindergarten. I have one eye weaker than the other,a cross eye. One eye turns in. Not as bad as when I was younger now I am mainly farsighted.. great at seeing far but not close. it is actually kind of interesting and I don't think about it often, but whenever the christmas tree was lit I would willingly let my eyes cross and the christmas tree was this spectacle like this, with all the lights blurred slightly. maybe this is where the idea came from... but it is not good for me to cross my eyes, though it is interesting I suppose.