Simply what happens generaly because of eyes you have an active side dominant and a supportive side to stableize the action. The active side is more flexable than the supportive, thats where generaly the problem begins. A good way to see this is by going on a running track middle lane eyes shut run 40 metres see which lane you finnish in, in fact have someone with you as a warning to stop. get back when youve tried it let me know where you finnished up gives me an idea how good or bad the problem is