Here’s a link to an informative article titled “The Case of the Reluctant Eye” which speaks to the problems some shooters have with “cross dominance”.  That is shooting right handed with a left-dominant eye or visa versa.

http://www.gundogsonline.com/ArticleServer.asp?strArticleID=C69A61E2-764A-4547-9787-A94CCB8A6B84

A little background on this.  For many if not most of us, the field of view from each eye is not equal, meaning one eye is dominant.  There are some simple tests you can do to figure this out including this one:  http://archeryweb.com/archery/eyedom.htm

If your dominant eye is on your shooting side, no problem.  If your dominant eye is opposite your shooting side (like me) you may have a big problem as that eye is not aligned with the barrel or bead.  To compensate, I learned to shoot left handed as a kid and that fixed most of the problem.  Next time you’re out shooting, check out the folks who are shooting left-handed.  I’ll bet that a number of them aren’t really left-handed, but learned to shoot that way to solve an eye dominance problem.          

Later on while shooting skeet I discovered another problem.  I noticed I was missing lots of birds flying left to right.  I had this weird visual shift just as the birds were crossing the center of the course.  I’d establish the right lead, start to squeeze the trigger, then suddenly the bird would seem to leap a couple feet to the right.  I’d make a last second adjustment to my lead and of course miss the bird completely. 

I talked to a shooting coach and he suggested the visual shift might be due to a handoff from left eye (dominant) to my right eye as the birds crossed my field of vision.  He recommended applying a small piece of clear tape to the top of the right lens of my shooting glasses as a minimal visual distracter.  The idea was to see if my left eye would stay dominant on those left to right birds.  Surprisingly it worked and added about five birds to my average score.  I’ve also made some other adjustments like taking the left side of the draw when hunting.  I don’t seem to miss nearly as often on my “strong” side.

If you’re struggling with your shooting it may be worthwhile to take the eye dominance test and see if you’ve got a “cross dominance” issue.