Back in the day when I used a climber,I went up the tree got settled and took my glasses off to wipe the sweat off my face,well you guessed it my glasses fell off my lap.Now here it is still pretty dark so down I go takes like half an hour to find them now the suns up I turn around and all I see are antlers,Never expecting to see a deer I have a nice buck 40yards behind me and no gun left it on the hook still unloaded of course.Well that did it for me contacts always when I am hunting..