I'm having trouble focusing my eyes while shooting my Arsenal AK with iron sights. When I shoot at 50yds I can put a consistent 1.5" group down on paper, but when I back out to a 100yds, my grouping opens up dramatically. I would just simply blame my eye sight for the issue but when I'm looking at the target 100yds away it is clear and easy to see until I'm looking down the sights and then target becomes fuzzy. I have tried changing targets with little to no change. I also always shoot with both eyes open. Any suggestions?