I find that I love Crimson Trace Laser Grips. That way I only have to focus on the dot on the target. It is about the only way I can force myself to shoot with both eyes open. You don't mention what guns you use so I can't tell you if they make a model for your particular favorite. If your gun(s) have rails you have many more laser options. There are also Laser Max's which replace your guide rod, but I don't care for them as I don't think you can adjust them.
Some people think I'm paranoid because I have guns. If I have guns, what do I have to be paranoid about?