I try to always shoot with both eyes open be it bow or gun (I was always told this was the
"right" way to shoot).

But, on longer archery shots (30 yards and beyond), and depending on the light, I sometimes
have a little trouble seeing double. When that happens I close my left eye right before the shot.

I am definitely right-eye dominant, so this is probably more a case of needing to update my
contact lens prescription.