'Distortions' are lens defects which tend to bend the image out of shape (but don't blur it). All lenses have distortions of some sort, though high quality lenses have distortions which are not as severe. (Jan 26, 2010)
~ MarkRaymondMason.com

Our perception is the lens through which we see the world around us. We can reduce the amount of distortion in our image of the world by developing a high quality lens.  The tools we use to refine our lens will vary for each of us and will differ at different times in our lives.   Regardless, keep polishing those lenses. 

Like Miyagi said, "Wax on, wax off".